Install Let’s Encrypt ssl certificate in Zimbra automated

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SystemMen - Install Let’s Encrypt ssl certificate in Zimbra automated. This article, I will guide you step by step to do this.

If you don’t know yet, Let’s Encrypt is a free project that provides SSL certificates.

This project aims to improve the safety of websites, contributing to making the internet environment safer.

Let’s Encrypt’s Certbot installation

First, we must install certbot on the Zimbra server. You can install Let’s Encrypt manually, but I recommend it is not necessary. Certbot is a utility tool.

Use the following command to download the certbot to your zimbra server.

[root@mail ~]# wget https://dl.eff.org/certbot-auto -P /usr/local/bin

It looks like this.

[root@mail ~]# wget https://dl.eff.org/certbot-auto -P /usr/local/bin
--2019-05-28 16:19:10--  https://dl.eff.org/certbot-auto
Resolving dl.eff.org (dl.eff.org)... 151.101.192.201, 151.101.64.201, 151.101.0.201, ...
Connecting to dl.eff.org (dl.eff.org)|151.101.192.201|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 68023 (66K) [application/octet-stream]
Saving to: ‘/usr/local/bin/certbot-auto’

100%[=====================================================================================================================================================================================================================================>] 68.023      --.-K/s   in 0,09s

2019-05-28 16:19:11 (758 KB/s) - ‘/usr/local/bin/certbot-auto’ saved [68023/68023]

After that, you grant permission to execute it. That’s it.

[root@mail ~]# chmod a+x /usr/local/bin/certbot-auto

Install Let’s Encrypt ssl certificate in Zimbra with YetOpen certbot-zimbra

Zimbra has an article that shows you how to install the Zimbra SSL certificate manually.

However, Zimbra also recommends that we use automated scripts. And in it, we will use YetOpen certbot-zimbra.

Download and install YetOpen certbot-zimbra

First, download certbot-zimbra to your zimbra server.

[root@mail ~]# wget https://raw.githubusercontent.com/YetOpen/certbot-zimbra/master/certbot_zimbra.sh -P /usr/local/bin

The result looks like this.

[root@mail ~]# wget https://raw.githubusercontent.com/YetOpen/certbot-zimbra/master/certbot_zimbra.sh -P /usr/local/bin
--2019-05-28 16:20:08--  https://raw.githubusercontent.com/YetOpen/certbot-zimbra/master/certbot_zimbra.sh
Resolving raw.githubusercontent.com (raw.githubusercontent.com)... 151.101.64.133, 151.101.0.133, 151.101.192.133, ...
Connecting to raw.githubusercontent.com (raw.githubusercontent.com)|151.101.64.133|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 13426 (13K) [text/plain]
Saving to: ‘/usr/local/bin/certbot_zimbra.sh’

100%[=====================================================================================================================================================================================================================================>] 13.426      --.-K/s   in 0,04s

2019-05-28 16:20:09 (342 KB/s) - ‘/usr/local/bin/certbot_zimbra.sh’ saved [13426/13426]

Grant execution permission for certbot-zimbra.

[root@mail ~]# chmod +x /usr/local/bin/certbot_zimbra.sh

Install Let’s Encrypt ssl certificate in Zimbra

Now, we start installing the ssl certificate for Zimbra mail server.

First, we determine the hostname of Zimbra server.

[root@mail ~]# /opt/zimbra/bin/zmhostname
mail.yourdomain.com

Next, run the following command to request the ssl certificate for the domain mail.

[root@mail ~]# certbot_zimbra.sh -n

Because we run certbot Let’s Encrypt for the first time, so it will install some necessary packages. From the next run, it will skip the installation.

[root@mail ~]# certbot_zimbra.sh -n
Certbot-Zimbra v0.5 - https://github.com/YetOpen/certbot-zimbra
Detected Zimbra 8.8.12
Making a backup of nginx templates in /opt/zimbra/conf/nginx/templates.20190528_162302
Stopping proxy...done.
Starting proxy...done.
Detected mail.yourdomain.com as Zimbra hostname
Bootstrapping dependencies for RedHat-based OSes... (you can skip this with --no-bootstrap)
yum is /usr/bin/yum
yum is hashed (/usr/bin/yum)
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
epel/x86_64/metalink                                                                                                                                                                                                                                    | 5.5 kB  00:00:00
* base: mirrors.viethosting.com
* epel: sg.fedora.ipserverone.com
* extras: mirrors.viethosting.com
* updates: mirrors.viethosting.com
base                                                                                                                                                                                                                                                    | 3.6 kB  00:00:00
epel                                                                                                                                                                                                                                                    | 4.7 kB  00:00:00
extras                                                                                                                                                                                                                                                  | 3.4 kB  00:00:00
updates                                                                                                                                                                                                                                                 | 3.4 kB  00:00:00
zimbra                                                                                                                                                                                                                                                  | 2.9 kB  00:00:00
zimbra-8812-oss                                                                                                                                                                                                                                         | 2.9 kB  00:00:00
(1/2): epel/x86_64/updateinfo                                                                                                                                                                                                                           | 1.0 MB  00:00:00
(2/2): epel/x86_64/primary_db                                                                                                                                                                                                                           | 6.7 MB  00:00:01
Package 1:openssl-1.0.2k-16.el7_6.1.x86_64 already installed and latest version
Package ca-certificates-2018.2.22-70.0.el7_5.noarch already installed and latest version
Resolving Dependencies
--> Running transaction check
---> Package augeas-libs.x86_64 0:1.4.0-6.el7_6.1 will be installed
---> Package gcc.x86_64 0:4.8.5-36.el7_6.2 will be installed
--> Processing Dependency: cpp = 4.8.5-36.el7_6.2 for package: gcc-4.8.5-36.el7_6.2.x86_64
--> Processing Dependency: libmpfr.so.4()(64bit) for package: gcc-4.8.5-36.el7_6.2.x86_64
--> Processing Dependency: libmpc.so.3()(64bit) for package: gcc-4.8.5-36.el7_6.2.x86_64
---> Package libffi-devel.x86_64 0:3.0.13-18.el7 will be installed
---> Package openssl-devel.x86_64 1:1.0.2k-16.el7_6.1 will be installed
--> Processing Dependency: zlib-devel(x86-64) for package: 1:openssl-devel-1.0.2k-16.el7_6.1.x86_64
--> Processing Dependency: krb5-devel(x86-64) for package: 1:openssl-devel-1.0.2k-16.el7_6.1.x86_64
---> Package python-devel.x86_64 0:2.7.5-77.el7_6 will be installed
---> Package python-tools.x86_64 0:2.7.5-77.el7_6 will be installed
--> Processing Dependency: tkinter = 2.7.5-77.el7_6 for package: python-tools-2.7.5-77.el7_6.x86_64
---> Package python-virtualenv.noarch 0:15.1.0-2.el7 will be installed
---> Package python2-pip.noarch 0:8.1.2-8.el7 will be installed
---> Package redhat-rpm-config.noarch 0:9.1.0-87.el7.centos will be installed
--> Processing Dependency: dwz >= 0.4 for package: redhat-rpm-config-9.1.0-87.el7.centos.noarch
--> Processing Dependency: zip for package: redhat-rpm-config-9.1.0-87.el7.centos.noarch
--> Processing Dependency: perl-srpm-macros for package: redhat-rpm-config-9.1.0-87.el7.centos.noarch
--> Running transaction check
---> Package cpp.x86_64 0:4.8.5-36.el7_6.2 will be installed
---> Package dwz.x86_64 0:0.11-3.el7 will be installed
---> Package krb5-devel.x86_64 0:1.15.1-37.el7_6 will be installed
--> Processing Dependency: libkadm5(x86-64) = 1.15.1-37.el7_6 for package: krb5-devel-1.15.1-37.el7_6.x86_64
--> Processing Dependency: libverto-devel for package: krb5-devel-1.15.1-37.el7_6.x86_64
--> Processing Dependency: libselinux-devel for package: krb5-devel-1.15.1-37.el7_6.x86_64
--> Processing Dependency: libcom_err-devel for package: krb5-devel-1.15.1-37.el7_6.x86_64
--> Processing Dependency: keyutils-libs-devel for package: krb5-devel-1.15.1-37.el7_6.x86_64
---> Package libmpc.x86_64 0:1.0.1-3.el7 will be installed
---> Package mpfr.x86_64 0:3.1.1-4.el7 will be installed
---> Package perl-srpm-macros.noarch 0:1-8.el7 will be installed
---> Package tkinter.x86_64 0:2.7.5-77.el7_6 will be installed
--> Processing Dependency: libtk8.5.so()(64bit) for package: tkinter-2.7.5-77.el7_6.x86_64
--> Processing Dependency: libtcl8.5.so()(64bit) for package: tkinter-2.7.5-77.el7_6.x86_64
--> Processing Dependency: libX11.so.6()(64bit) for package: tkinter-2.7.5-77.el7_6.x86_64
--> Processing Dependency: libTix.so()(64bit) for package: tkinter-2.7.5-77.el7_6.x86_64
---> Package zip.x86_64 0:3.0-11.el7 will be installed
---> Package zlib-devel.x86_64 0:1.2.7-18.el7 will be installed
--> Running transaction check
---> Package keyutils-libs-devel.x86_64 0:1.5.8-3.el7 will be installed
---> Package libX11.x86_64 0:1.6.5-2.el7 will be installed
--> Processing Dependency: libX11-common >= 1.6.5-2.el7 for package: libX11-1.6.5-2.el7.x86_64
--> Processing Dependency: libxcb.so.1()(64bit) for package: libX11-1.6.5-2.el7.x86_64
---> Package libcom_err-devel.x86_64 0:1.42.9-13.el7 will be installed
---> Package libkadm5.x86_64 0:1.15.1-37.el7_6 will be installed
---> Package libselinux-devel.x86_64 0:2.5-14.1.el7 will be installed
--> Processing Dependency: libsepol-devel(x86-64) >= 2.5-10 for package: libselinux-devel-2.5-14.1.el7.x86_64
--> Processing Dependency: pkgconfig(libsepol) for package: libselinux-devel-2.5-14.1.el7.x86_64
--> Processing Dependency: pkgconfig(libpcre) for package: libselinux-devel-2.5-14.1.el7.x86_64
---> Package libverto-devel.x86_64 0:0.2.5-4.el7 will be installed
---> Package tcl.x86_64 1:8.5.13-8.el7 will be installed
---> Package tix.x86_64 1:8.4.3-12.el7 will be installed
---> Package tk.x86_64 1:8.5.13-6.el7 will be installed
--> Processing Dependency: libXft.so.2()(64bit) for package: 1:tk-8.5.13-6.el7.x86_64
--> Running transaction check
---> Package libX11-common.noarch 0:1.6.5-2.el7 will be installed
---> Package libXft.x86_64 0:2.3.2-2.el7 will be installed
--> Processing Dependency: fontconfig >= 2.2-1 for package: libXft-2.3.2-2.el7.x86_64
--> Processing Dependency: libfontconfig.so.1()(64bit) for package: libXft-2.3.2-2.el7.x86_64
--> Processing Dependency: libXrender.so.1()(64bit) for package: libXft-2.3.2-2.el7.x86_64
---> Package libsepol-devel.x86_64 0:2.5-10.el7 will be installed
---> Package libxcb.x86_64 0:1.13-1.el7 will be installed
--> Processing Dependency: libXau.so.6()(64bit) for package: libxcb-1.13-1.el7.x86_64
---> Package pcre-devel.x86_64 0:8.32-17.el7 will be installed
--> Running transaction check
---> Package fontconfig.x86_64 0:2.13.0-4.3.el7 will be installed
--> Processing Dependency: fontpackages-filesystem for package: fontconfig-2.13.0-4.3.el7.x86_64
--> Processing Dependency: dejavu-sans-fonts for package: fontconfig-2.13.0-4.3.el7.x86_64
---> Package libXau.x86_64 0:1.0.8-2.1.el7 will be installed
---> Package libXrender.x86_64 0:0.9.10-1.el7 will be installed
--> Running transaction check
---> Package dejavu-sans-fonts.noarch 0:2.33-6.el7 will be installed
--> Processing Dependency: dejavu-fonts-common = 2.33-6.el7 for package: dejavu-sans-fonts-2.33-6.el7.noarch
---> Package fontpackages-filesystem.noarch 0:1.44-8.el7 will be installed
--> Running transaction check
---> Package dejavu-fonts-common.noarch 0:2.33-6.el7 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
===============================================================================================================================================================================================================================================================================
Package                                                                    Arch                                                      Version                                                                 Repository                                                  Size
===============================================================================================================================================================================================================================================================================
Installing:
augeas-libs                                                                x86_64                                                    1.4.0-6.el7_6.1                                                         updates                                                    355 k
gcc                                                                        x86_64                                                    4.8.5-36.el7_6.2                                                        updates                                                     16 M
libffi-devel                                                               x86_64                                                    3.0.13-18.el7                                                           base                                                        23 k
openssl-devel                                                              x86_64                                                    1:1.0.2k-16.el7_6.1                                                     updates                                                    1.5 M
python-devel                                                               x86_64                                                    2.7.5-77.el7_6                                                          updates                                                    398 k
python-tools                                                               x86_64                                                    2.7.5-77.el7_6                                                          updates                                                    856 k
python-virtualenv                                                          noarch                                                    15.1.0-2.el7                                                            base                                                       1.7 M
python2-pip                                                                noarch                                                    8.1.2-8.el7                                                             epel                                                       1.7 M
redhat-rpm-config                                                          noarch                                                    9.1.0-87.el7.centos                                                     base                                                        81 k
Installing for dependencies:
cpp                                                                        x86_64                                                    4.8.5-36.el7_6.2                                                        updates                                                    5.9 M
dejavu-fonts-common                                                        noarch                                                    2.33-6.el7                                                              base                                                        64 k
dejavu-sans-fonts                                                          noarch                                                    2.33-6.el7                                                              base                                                       1.4 M
dwz                                                                        x86_64                                                    0.11-3.el7                                                              base                                                        99 k
fontconfig                                                                 x86_64                                                    2.13.0-4.3.el7                                                          base                                                       254 k
fontpackages-filesystem                                                    noarch                                                    1.44-8.el7                                                              base                                                       9.9 k
keyutils-libs-devel                                                        x86_64                                                    1.5.8-3.el7                                                             base                                                        37 k
krb5-devel                                                                 x86_64                                                    1.15.1-37.el7_6                                                         updates                                                    271 k
libX11                                                                     x86_64                                                    1.6.5-2.el7                                                             base                                                       606 k
libX11-common                                                              noarch                                                    1.6.5-2.el7                                                             base                                                       164 k
libXau                                                                     x86_64                                                    1.0.8-2.1.el7                                                           base                                                        29 k
libXft                                                                     x86_64                                                    2.3.2-2.el7                                                             base                                                        58 k
libXrender                                                                 x86_64                                                    0.9.10-1.el7                                                            base                                                        26 k
libcom_err-devel                                                           x86_64                                                    1.42.9-13.el7                                                           base                                                        31 k
libkadm5                                                                   x86_64                                                    1.15.1-37.el7_6                                                         updates                                                    178 k
libmpc                                                                     x86_64                                                    1.0.1-3.el7                                                             base                                                        51 k
libselinux-devel                                                           x86_64                                                    2.5-14.1.el7                                                            base                                                       187 k
libsepol-devel                                                             x86_64                                                    2.5-10.el7                                                              base                                                        77 k
libverto-devel                                                             x86_64                                                    0.2.5-4.el7                                                             base                                                        12 k
libxcb                                                                     x86_64                                                    1.13-1.el7                                                              base                                                       214 k
mpfr                                                                       x86_64                                                    3.1.1-4.el7                                                             base                                                       203 k
pcre-devel                                                                 x86_64                                                    8.32-17.el7                                                             base                                                       480 k
perl-srpm-macros                                                           noarch                                                    1-8.el7                                                                 base                                                       4.6 k
tcl                                                                        x86_64                                                    1:8.5.13-8.el7                                                          base                                                       1.9 M
tix                                                                        x86_64                                                    1:8.4.3-12.el7                                                          base                                                       254 k
tk                                                                         x86_64                                                    1:8.5.13-6.el7                                                          base                                                       1.4 M
tkinter                                                                    x86_64                                                    2.7.5-77.el7_6                                                          updates                                                    326 k
zip                                                                        x86_64                                                    3.0-11.el7                                                              base                                                       260 k
zlib-devel                                                                 x86_64                                                    1.2.7-18.el7                                                            base                                                        50 k
Transaction Summary
===============================================================================================================================================================================================================================================================================
Install  9 Packages (+29 Dependent packages)
Total download size: 37 M
Installed size: 94 M
Is this ok [y/d/N]: y
Downloading packages:
(1/38): dejavu-fonts-common-2.33-6.el7.noarch.rpm                                                                                                                                                                                                       |  64 kB  00:00:00
(2/38): augeas-libs-1.4.0-6.el7_6.1.x86_64.rpm                                                                                                                                                                                                          | 355 kB  00:00:00
(3/38): fontpackages-filesystem-1.44-8.el7.noarch.rpm                                                                                                                                                                                                   | 9.9 kB  00:00:00
(4/38): fontconfig-2.13.0-4.3.el7.x86_64.rpm                                                                                                                                                                                                            | 254 kB  00:00:00
(5/38): dwz-0.11-3.el7.x86_64.rpm                                                                                                                                                                                                                       |  99 kB  00:00:00
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(7/38): krb5-devel-1.15.1-37.el7_6.x86_64.rpm                                                                                                                                                                                                           | 271 kB  00:00:00
(8/38): libX11-common-1.6.5-2.el7.noarch.rpm                                                                                                                                                                                                            | 164 kB  00:00:00
(9/38): libXau-1.0.8-2.1.el7.x86_64.rpm                                                                                                                                                                                                                 |  29 kB  00:00:00
(10/38): libX11-1.6.5-2.el7.x86_64.rpm                                                                                                                                                                                                                  | 606 kB  00:00:00
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(12/38): libXft-2.3.2-2.el7.x86_64.rpm                                                                                                                                                                                                                  |  58 kB  00:00:00
(13/38): libcom_err-devel-1.42.9-13.el7.x86_64.rpm                                                                                                                                                                                                      |  31 kB  00:00:00
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(15/38): libmpc-1.0.1-3.el7.x86_64.rpm                                                                                                                                                                                                                  |  51 kB  00:00:00
(16/38): libselinux-devel-2.5-14.1.el7.x86_64.rpm                                                                                                                                                                                                       | 187 kB  00:00:00
(17/38): libsepol-devel-2.5-10.el7.x86_64.rpm                                                                                                                                                                                                           |  77 kB  00:00:00
(18/38): libkadm5-1.15.1-37.el7_6.x86_64.rpm                                                                                                                                                                                                            | 178 kB  00:00:00
(19/38): libverto-devel-0.2.5-4.el7.x86_64.rpm                                                                                                                                                                                                          |  12 kB  00:00:00
(20/38): dejavu-sans-fonts-2.33-6.el7.noarch.rpm                                                                                                                                                                                                        | 1.4 MB  00:00:01
(21/38): libxcb-1.13-1.el7.x86_64.rpm                                                                                                                                                                                                                   | 214 kB  00:00:00
(22/38): mpfr-3.1.1-4.el7.x86_64.rpm                                                                                                                                                                                                                    | 203 kB  00:00:00
(23/38): perl-srpm-macros-1-8.el7.noarch.rpm                                                                                                                                                                                                            | 4.6 kB  00:00:00
(24/38): python-devel-2.7.5-77.el7_6.x86_64.rpm                                                                                                                                                                                                         | 398 kB  00:00:00
(25/38): pcre-devel-8.32-17.el7.x86_64.rpm                                                                                                                                                                                                              | 480 kB  00:00:00
(26/38): python-tools-2.7.5-77.el7_6.x86_64.rpm                                                                                                                                                                                                         | 856 kB  00:00:00
(27/38): openssl-devel-1.0.2k-16.el7_6.1.x86_64.rpm                                                                                                                                                                                                     | 1.5 MB  00:00:01
(28/38): redhat-rpm-config-9.1.0-87.el7.centos.noarch.rpm                                                                                                                                                                                               |  81 kB  00:00:00
(29/38): python-virtualenv-15.1.0-2.el7.noarch.rpm                                                                                                                                                                                                      | 1.7 MB  00:00:01
(30/38): tix-8.4.3-12.el7.x86_64.rpm                                                                                                                                                                                                                    | 254 kB  00:00:00
warning: /var/cache/yum/x86_64/7/epel/packages/python2-pip-8.1.2-8.el7.noarch.rpm: Header V3 RSA/SHA256 Signature, key ID 352c64e5: NOKEY
Public key for python2-pip-8.1.2-8.el7.noarch.rpm is not installed
(31/38): python2-pip-8.1.2-8.el7.noarch.rpm                                                                                                                                                                                                             | 1.7 MB  00:00:01
(32/38): tkinter-2.7.5-77.el7_6.x86_64.rpm                                                                                                                                                                                                              | 326 kB  00:00:00
(33/38): zip-3.0-11.el7.x86_64.rpm                                                                                                                                                                                                                      | 260 kB  00:00:00
(34/38): tcl-8.5.13-8.el7.x86_64.rpm                                                                                                                                                                                                                    | 1.9 MB  00:00:01
(35/38): zlib-devel-1.2.7-18.el7.x86_64.rpm                                                                                                                                                                                                             |  50 kB  00:00:00
(36/38): cpp-4.8.5-36.el7_6.2.x86_64.rpm                                                                                                                                                                                                                | 5.9 MB  00:00:04
(37/38): tk-8.5.13-6.el7.x86_64.rpm                                                                                                                                                                                                                     | 1.4 MB  00:00:01
(38/38): gcc-4.8.5-36.el7_6.2.x86_64.rpm                                                                                                                                                                                                                |  16 MB  00:00:06
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Total                                                                                                                                                                                                                                          5.2 MB/s |  37 MB  00:00:07
Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
Importing GPG key 0x352C64E5:
Userid     : "Fedora EPEL (7) <epel@fedoraproject.org>"
Fingerprint: 91e9 7d7c 4a5e 96f1 7f3e 888f 6a2f aea2 352c 64e5
Package    : epel-release-7-11.noarch (@extras)
From       : /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
Is this ok [y/N]: y
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : mpfr-3.1.1-4.el7.x86_64                                                                                                                                                                                                                                    1/38
Installing : 1:tcl-8.5.13-8.el7.x86_64                                                                                                                                                                                                                                  2/38
Installing : libmpc-1.0.1-3.el7.x86_64                                                                                                                                                                                                                                  3/38
Installing : fontpackages-filesystem-1.44-8.el7.noarch                                                                                                                                                                                                                  4/38
Installing : dejavu-fonts-common-2.33-6.el7.noarch                                                                                                                                                                                                                      5/38
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Installing : fontconfig-2.13.0-4.3.el7.x86_64                                                                                                                                                                                                                           7/38
Installing : cpp-4.8.5-36.el7_6.2.x86_64                                                                                                                                                                                                                                8/38
Installing : dwz-0.11-3.el7.x86_64                                                                                                                                                                                                                                      9/38
Installing : libX11-common-1.6.5-2.el7.noarch                                                                                                                                                                                                                          10/38
Installing : zip-3.0-11.el7.x86_64                                                                                                                                                                                                                                     11/38
Installing : libkadm5-1.15.1-37.el7_6.x86_64                                                                                                                                                                                                                           12/38
Installing : libXau-1.0.8-2.1.el7.x86_64                                                                                                                                                                                                                               13/38
Installing : libxcb-1.13-1.el7.x86_64                                                                                                                                                                                                                                  14/38
Installing : libX11-1.6.5-2.el7.x86_64                                                                                                                                                                                                                                 15/38
Installing : libXrender-0.9.10-1.el7.x86_64                                                                                                                                                                                                                            16/38
Installing : libXft-2.3.2-2.el7.x86_64                                                                                                                                                                                                                                 17/38
Installing : 1:tk-8.5.13-6.el7.x86_64                                                                                                                                                                                                                                  18/38
Installing : 1:tix-8.4.3-12.el7.x86_64                                                                                                                                                                                                                                 19/38
Installing : tkinter-2.7.5-77.el7_6.x86_64                                                                                                                                                                                                                             20/38
Installing : libsepol-devel-2.5-10.el7.x86_64                                                                                                                                                                                                                          21/38
Installing : perl-srpm-macros-1-8.el7.noarch                                                                                                                                                                                                                           22/38
Installing : zlib-devel-1.2.7-18.el7.x86_64                                                                                                                                                                                                                            23/38
Installing : libverto-devel-0.2.5-4.el7.x86_64                                                                                                                                                                                                                         24/38
Installing : keyutils-libs-devel-1.5.8-3.el7.x86_64                                                                                                                                                                                                                    25/38
Installing : libcom_err-devel-1.42.9-13.el7.x86_64                                                                                                                                                                                                                     26/38
Installing : python-devel-2.7.5-77.el7_6.x86_64                                                                                                                                                                                                                        27/38
Installing : pcre-devel-8.32-17.el7.x86_64                                                                                                                                                                                                                             28/38
Installing : libselinux-devel-2.5-14.1.el7.x86_64                                                                                                                                                                                                                      29/38
Installing : krb5-devel-1.15.1-37.el7_6.x86_64                                                                                                                                                                                                                         30/38
Installing : 1:openssl-devel-1.0.2k-16.el7_6.1.x86_64                                                                                                                                                                                                                  31/38
Installing : python-virtualenv-15.1.0-2.el7.noarch                                                                                                                                                                                                                     32/38
Installing : redhat-rpm-config-9.1.0-87.el7.centos.noarch                                                                                                                                                                                                              33/38
Installing : python-tools-2.7.5-77.el7_6.x86_64                                                                                                                                                                                                                        34/38
Installing : gcc-4.8.5-36.el7_6.2.x86_64                                                                                                                                                                                                                               35/38
Installing : augeas-libs-1.4.0-6.el7_6.1.x86_64                                                                                                                                                                                                                        36/38
Installing : python2-pip-8.1.2-8.el7.noarch                                                                                                                                                                                                                            37/38
Installing : libffi-devel-3.0.13-18.el7.x86_64                                                                                                                                                                                                                         38/38
Verifying  : 1:tcl-8.5.13-8.el7.x86_64                                                                                                                                                                                                                                  1/38
Verifying  : fontconfig-2.13.0-4.3.el7.x86_64                                                                                                                                                                                                                           2/38
Verifying  : python-tools-2.7.5-77.el7_6.x86_64                                                                                                                                                                                                                         3/38
Verifying  : libXrender-0.9.10-1.el7.x86_64                                                                                                                                                                                                                             4/38
Verifying  : mpfr-3.1.1-4.el7.x86_64                                                                                                                                                                                                                                    5/38
Verifying  : pcre-devel-8.32-17.el7.x86_64                                                                                                                                                                                                                              6/38
Verifying  : 1:tix-8.4.3-12.el7.x86_64                                                                                                                                                                                                                                  7/38
Verifying  : gcc-4.8.5-36.el7_6.2.x86_64                                                                                                                                                                                                                                8/38
Verifying  : python-devel-2.7.5-77.el7_6.x86_64                                                                                                                                                                                                                         9/38
Verifying  : libcom_err-devel-1.42.9-13.el7.x86_64                                                                                                                                                                                                                     10/38
Verifying  : krb5-devel-1.15.1-37.el7_6.x86_64                                                                                                                                                                                                                         11/38
Verifying  : keyutils-libs-devel-1.5.8-3.el7.x86_64                                                                                                                                                                                                                    12/38
Verifying  : libffi-devel-3.0.13-18.el7.x86_64                                                                                                                                                                                                                         13/38
Verifying  : libverto-devel-0.2.5-4.el7.x86_64                                                                                                                                                                                                                         14/38
Verifying  : zlib-devel-1.2.7-18.el7.x86_64                                                                                                                                                                                                                            15/38
Verifying  : perl-srpm-macros-1-8.el7.noarch                                                                                                                                                                                                                           16/38
Verifying  : dejavu-fonts-common-2.33-6.el7.noarch                                                                                                                                                                                                                     17/38
Verifying  : libselinux-devel-2.5-14.1.el7.x86_64                                                                                                                                                                                                                      18/38
Verifying  : libxcb-1.13-1.el7.x86_64                                                                                                                                                                                                                                  19/38
Verifying  : 1:tk-8.5.13-6.el7.x86_64                                                                                                                                                                                                                                  20/38
Verifying  : redhat-rpm-config-9.1.0-87.el7.centos.noarch                                                                                                                                                                                                              21/38
Verifying  : python2-pip-8.1.2-8.el7.noarch                                                                                                                                                                                                                            22/38
Verifying  : cpp-4.8.5-36.el7_6.2.x86_64                                                                                                                                                                                                                               23/38
Verifying  : libX11-1.6.5-2.el7.x86_64                                                                                                                                                                                                                                 24/38
Verifying  : dejavu-sans-fonts-2.33-6.el7.noarch                                                                                                                                                                                                                       25/38
Verifying  : python-virtualenv-15.1.0-2.el7.noarch                                                                                                                                                                                                                     26/38
Verifying  : libsepol-devel-2.5-10.el7.x86_64                                                                                                                                                                                                                          27/38
Verifying  : 1:openssl-devel-1.0.2k-16.el7_6.1.x86_64                                                                                                                                                                                                                  28/38
Verifying  : libXau-1.0.8-2.1.el7.x86_64                                                                                                                                                                                                                               29/38
Verifying  : libkadm5-1.15.1-37.el7_6.x86_64                                                                                                                                                                                                                           30/38
Verifying  : zip-3.0-11.el7.x86_64                                                                                                                                                                                                                                     31/38
Verifying  : libX11-common-1.6.5-2.el7.noarch                                                                                                                                                                                                                          32/38
Verifying  : fontpackages-filesystem-1.44-8.el7.noarch                                                                                                                                                                                                                 33/38
Verifying  : dwz-0.11-3.el7.x86_64                                                                                                                                                                                                                                     34/38
Verifying  : libXft-2.3.2-2.el7.x86_64                                                                                                                                                                                                                                 35/38
Verifying  : augeas-libs-1.4.0-6.el7_6.1.x86_64                                                                                                                                                                                                                        36/38
Verifying  : tkinter-2.7.5-77.el7_6.x86_64                                                                                                                                                                                                                             37/38
Verifying  : libmpc-1.0.1-3.el7.x86_64                                                                                                                                                                                                                                 38/38
Installed:
augeas-libs.x86_64 0:1.4.0-6.el7_6.1         gcc.x86_64 0:4.8.5-36.el7_6.2         libffi-devel.x86_64 0:3.0.13-18.el7                 openssl-devel.x86_64 1:1.0.2k-16.el7_6.1      python-devel.x86_64 0:2.7.5-77.el7_6      python-tools.x86_64 0:2.7.5-77.el7_6
python-virtualenv.noarch 0:15.1.0-2.el7      python2-pip.noarch 0:8.1.2-8.el7      redhat-rpm-config.noarch 0:9.1.0-87.el7.centos
Dependency Installed:
cpp.x86_64 0:4.8.5-36.el7_6.2                 dejavu-fonts-common.noarch 0:2.33-6.el7      dejavu-sans-fonts.noarch 0:2.33-6.el7      dwz.x86_64 0:0.11-3.el7                 fontconfig.x86_64 0:2.13.0-4.3.el7          fontpackages-filesystem.noarch 0:1.44-8.el7
keyutils-libs-devel.x86_64 0:1.5.8-3.el7      krb5-devel.x86_64 0:1.15.1-37.el7_6          libX11.x86_64 0:1.6.5-2.el7                libX11-common.noarch 0:1.6.5-2.el7      libXau.x86_64 0:1.0.8-2.1.el7               libXft.x86_64 0:2.3.2-2.el7
libXrender.x86_64 0:0.9.10-1.el7              libcom_err-devel.x86_64 0:1.42.9-13.el7      libkadm5.x86_64 0:1.15.1-37.el7_6          libmpc.x86_64 0:1.0.1-3.el7             libselinux-devel.x86_64 0:2.5-14.1.el7      libsepol-devel.x86_64 0:2.5-10.el7
libverto-devel.x86_64 0:0.2.5-4.el7           libxcb.x86_64 0:1.13-1.el7                   mpfr.x86_64 0:3.1.1-4.el7                  pcre-devel.x86_64 0:8.32-17.el7         perl-srpm-macros.noarch 0:1-8.el7           tcl.x86_64 1:8.5.13-8.el7
tix.x86_64 1:8.4.3-12.el7                     tk.x86_64 1:8.5.13-6.el7                     tkinter.x86_64 0:2.7.5-77.el7_6            zip.x86_64 0:3.0-11.el7                 zlib-devel.x86_64 0:1.2.7-18.el7
Complete!
Creating virtual environment...
Installing Python packages...
Installation succeeded.
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator webroot, Installer None
Enter email address (used for urgent renewal and security notices) (Enter 'c' to
cancel): admin@yourdomain.com
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Please read the Terms of Service at
https://letsencrypt.org/documents/LE-SA-v1.2-November-15-2017.pdf. You must
agree in order to register with the ACME server at
https://acme-v02.api.letsencrypt.org/directory
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
(A)gree/(C)ancel: A
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Would you be willing to share your email address with the Electronic Frontier
Foundation, a founding partner of the Let's Encrypt project and the non-profit
organization that develops Certbot? We'd like to send you email about our work
encrypting the web, EFF news, campaigns, and ways to support digital freedom.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
(Y)es/(N)o: N
Obtaining a new certificate
Performing the following challenges:
http-01 challenge for mail.yourdomain.com
Using the webroot path /opt/zimbra/data/nginx/html for all unmatched domains.
Waiting for verification...
Cleaning up challenges
IMPORTANT NOTES:
- Congratulations! Your certificate and chain have been saved at:
/etc/letsencrypt/live/mail.yourdomain.com/fullchain.pem
Your key file has been saved at:
/etc/letsencrypt/live/mail.yourdomain.com/privkey.pem
Your cert will expire on 2019-08-26. To obtain a new or tweaked
version of this certificate in the future, simply run certbot-auto
again. To non-interactively renew *all* of your certificates, run
"certbot-auto renew"
- Your account credentials have been saved in your Certbot
configuration directory at /etc/letsencrypt. You should make a
secure backup of this folder now. This configuration directory will
also contain certificates and private keys obtained by Certbot so
making regular backups of this folder is ideal.
- If you like Certbot, please consider supporting our work by:
Donating to ISRG / Let's Encrypt:   https://letsencrypt.org/donate
Donating to EFF:                    https://eff.org/donate-le
** Verifying '/opt/zimbra/ssl/letsencrypt/cert.pem' against '/opt/zimbra/ssl/letsencrypt/privkey.pem'
Certificate '/opt/zimbra/ssl/letsencrypt/cert.pem' and private key '/opt/zimbra/ssl/letsencrypt/privkey.pem' match.
** Verifying '/opt/zimbra/ssl/letsencrypt/cert.pem' against '/opt/zimbra/ssl/letsencrypt/zimbra_chain.pem'
Valid certificate chain: /opt/zimbra/ssl/letsencrypt/cert.pem: OK
** Verifying '/opt/zimbra/ssl/letsencrypt/cert.pem' against '/opt/zimbra/ssl/zimbra/commercial/commercial.key'
Certificate '/opt/zimbra/ssl/letsencrypt/cert.pem' and private key '/opt/zimbra/ssl/zimbra/commercial/commercial.key' match.
** Verifying '/opt/zimbra/ssl/letsencrypt/cert.pem' against '/opt/zimbra/ssl/letsencrypt/zimbra_chain.pem'
Valid certificate chain: /opt/zimbra/ssl/letsencrypt/cert.pem: OK
** Copying '/opt/zimbra/ssl/letsencrypt/cert.pem' to '/opt/zimbra/ssl/zimbra/commercial/commercial.crt'
** Copying '/opt/zimbra/ssl/letsencrypt/zimbra_chain.pem' to '/opt/zimbra/ssl/zimbra/commercial/commercial_ca.crt'
** Appending ca chain '/opt/zimbra/ssl/letsencrypt/zimbra_chain.pem' to '/opt/zimbra/ssl/zimbra/commercial/commercial.crt'
** Importing cert '/opt/zimbra/ssl/zimbra/commercial/commercial_ca.crt' as 'zcs-user-commercial_ca' into cacerts '/opt/zimbra/common/lib/jvm/java/lib/security/cacerts'
** NOTE: restart mailboxd to use the imported certificate.
** Saving config key 'zimbraSSLCertificate' via zmprov modifyServer mail.yourdomain.com...ok
** Saving config key 'zimbraSSLPrivateKey' via zmprov modifyServer mail.yourdomain.com...ok
** Installing imapd certificate '/opt/zimbra/conf/imapd.crt' and key '/opt/zimbra/conf/imapd.key'
** Copying '/opt/zimbra/ssl/zimbra/commercial/commercial.crt' to '/opt/zimbra/conf/imapd.crt'
** Copying '/opt/zimbra/ssl/zimbra/commercial/commercial.key' to '/opt/zimbra/conf/imapd.key'
** Creating file '/opt/zimbra/ssl/zimbra/jetty.pkcs12'
** Creating keystore '/opt/zimbra/conf/imapd.keystore'
** Installing ldap certificate '/opt/zimbra/conf/slapd.crt' and key '/opt/zimbra/conf/slapd.key'
** Copying '/opt/zimbra/ssl/zimbra/commercial/commercial.crt' to '/opt/zimbra/conf/slapd.crt'
** Copying '/opt/zimbra/ssl/zimbra/commercial/commercial.key' to '/opt/zimbra/conf/slapd.key'
** Creating file '/opt/zimbra/ssl/zimbra/jetty.pkcs12'
** Creating keystore '/opt/zimbra/mailboxd/etc/keystore'
** Installing mta certificate '/opt/zimbra/conf/smtpd.crt' and key '/opt/zimbra/conf/smtpd.key'
** Copying '/opt/zimbra/ssl/zimbra/commercial/commercial.crt' to '/opt/zimbra/conf/smtpd.crt'
** Copying '/opt/zimbra/ssl/zimbra/commercial/commercial.key' to '/opt/zimbra/conf/smtpd.key'
** Installing proxy certificate '/opt/zimbra/conf/nginx.crt' and key '/opt/zimbra/conf/nginx.key'
** Copying '/opt/zimbra/ssl/zimbra/commercial/commercial.crt' to '/opt/zimbra/conf/nginx.crt'
** Copying '/opt/zimbra/ssl/zimbra/commercial/commercial.key' to '/opt/zimbra/conf/nginx.key'
** NOTE: restart services to use the new certificates.
** Cleaning up 3 files from '/opt/zimbra/conf/ca'
** Removing /opt/zimbra/conf/ca/ca.key
** Removing /opt/zimbra/conf/ca/ca.pem
** Removing /opt/zimbra/conf/ca/b8c8cdf8.0
** Copying CA to /opt/zimbra/conf/ca
** Copying '/opt/zimbra/ssl/zimbra/ca/ca.key' to '/opt/zimbra/conf/ca/ca.key'
** Copying '/opt/zimbra/ssl/zimbra/ca/ca.pem' to '/opt/zimbra/conf/ca/ca.pem'
** Creating CA hash symlink 'b8c8cdf8.0' -> 'ca.pem'
** Creating /opt/zimbra/conf/ca/commercial_ca_1.crt
** Creating CA hash symlink '4f06f81d.0' -> 'commercial_ca_1.crt'
** Creating /opt/zimbra/conf/ca/commercial_ca_2.crt
** Creating CA hash symlink '2e5ac55d.0' -> 'commercial_ca_2.crt'
Host mail.yourdomain.com
Stopping zmconfigd...Done.
Stopping imapd...Done.
Stopping zimlet webapp...Done.
Stopping zimbraAdmin webapp...Done.
Stopping zimbra webapp...Done.
Stopping service webapp...Done.
Stopping stats...Done.
Stopping mta...Done.
Stopping spell...Done.
Stopping snmp...Done.
Stopping cbpolicyd...Done.
Stopping archiving...Done.
Stopping opendkim...Done.
Stopping amavis...Done.
Stopping antivirus...Done.
Stopping antispam...Done.
Stopping proxy...Done.
Stopping memcached...Done.
Stopping mailbox...Done.
Stopping logger...Done.
Stopping dnscache...Done.
Stopping ldap...Done.
Host mail.yourdomain.com
Starting ldap...Done.
Starting zmconfigd...Done.
Starting logger...Done.
Starting mailbox...Done.
Starting memcached...Done.
Starting proxy...Done.
Starting amavis...Done.
Starting antispam...Done.
Starting antivirus...Done.
Starting opendkim...Done.
Starting snmp...Done.
Starting spell...Done.
Starting mta...Done.
Starting stats...Done.
Starting service webapp...Done.
Starting zimbra webapp...Done.
Starting zimbraAdmin webapp...Done.
Starting zimlet webapp...Done.
Starting imapd...Done.

If your log is the same as above, congratulations on installing a successful certificate SSL.

Setting up crontab auto renew ssl certificates

install-lets-encrypt-ssl-certificate-in-zimbra-automated Install Let's Encrypt ssl certificate in Zimbra automated
Setting up crontab auto renew ssl certificates for Zimbra.

Because Let’s Encrypt ssl certificates have 90 days, so you need to renew it before it expires. But you can’t do it manually, you need to do it automatically.

You create a crontab with the following content.

00 3 * * * root /usr/local/bin/certbot-auto renew --post-hook "/usr/local/bin/certbot_zimbra.sh -r -d $(/opt/zimbra/bin/zmhostname)"

Because the renew will have to restart zimbra, so you should put crontab outside the company’s working hours. I think 3 am is appropriate, you can edit it.

Crontab will check the renew once a day. You can specify the domain immediately after the -d option.

Conclusion

So I instructed you to use certbot-zimbra to successfully install the ssl certificate for Zimbra mail server. Hope you can do it without any errors.

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