Here’s how I install SSL certificates for Horde and Roundcube bundled with Plesk 12.0.18 to remove chain issues, and keep the certificate in scope of Plesk backups.
INSTALL
Firstly, install your webmail certificate in…
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Plesk -> Tools & Settings -> SSL Certificates |
And then go to…
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Plesk -> Tools & Settings -> Database Servers -> PHPMyAdmin -> psa -> certificates |
Get the file names for the webmail certificate and CA certificate and make a custom horde and roundcube template (paths to follow) adding the following directives.
THE DIRECTIVES
Apache files (horde.php and roundcube.php)
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SSLCertificateKeyFile "/opt/psa/var/certificates/cert-name" SSLCertificateFile "/opt/psa/var/certificates/cert-name" SSLCACertificateFile "/opt/psa/var/certificates/ca-name" |
Nginx File (nginxWebmailPartial.php)
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ssl_certificate /opt/psa/var/certificates/cert-name; ssl_certificate_key /opt/psa/var/certificates/cert-name; ssl_client_certificate /opt/psa/var/certificates/ca-name; |
I do this because the CA directives are missing from the default Apache2 templates.
TEMPLATE LOCATION
Templates are located here..
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/opt/psa/admin/conf/templates/default/horde.php /opt/psa/admin/conf/templates/default/roundcube.php /opt/psa/admin/conf/templates/default/nginxWebmailPartial.php |
copy the above files to
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/opt/psa/admin/conf/templates/custom |
and then edit the files..
EDITING THE TEMPLATES
You need to find and replace the SSL directive/s in the template files and replace with the ones above.
horde.php line 83, and roundcube.php line 86
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SSLCertificateFile "<?php echo $ipAddress->sslCertificate->ceFilePath ?>" |
become…
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SSLCertificateKeyFile "/opt/psa/var/certificates/cert-name" SSLCertificateFile "/opt/psa/var/certificates/cert-name" SSLCACertificateFile "/opt/psa/var/certificates/ca-name" |
nginxWebmailPartial.php, there’s a big chunk you need to remove, lines 10 to 26 (in your file)…
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<?php if ($OPT['ssl']): ?> <?php $sslCertificate = $ipAddress->sslCertificate; ?> <?php if ($sslCertificate->ce): ?> ssl_certificate <?php echo $sslCertificate->ceFilePath ?>; ssl_certificate_key <?php echo $sslCertificate->ceFilePath ?>; <?php if ($sslCertificate->ca): ?> ssl_client_certificate <?php echo $sslCertificate->caFilePath ?>; <?php endif ?> ssl_session_timeout 5m; <?php if (get_param('disablesslv3')): ?> ssl_protocols TLSv1 TLSv1.1 TLSv1.2; <?php else: ?> ssl_protocols SSLv2 SSLv3 TLSv1 TLSv1.1 TLSv1.2; <?php endif ?> ssl_ciphers HIGH:!aNULL:!MD5; ssl_prefer_server_ciphers on; <?php endif ?> <?php endif ?> |
Becomes something like…
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<?php if ($OPT['ssl']): ?> ssl_ecdh_curve secp384r1; ssl_dhparam /etc/ssl/dh/RSA4096.pem; ssl_certificate /opt/psa/var/certificates/cert-name; ssl_certificate_key /opt/psa/var/certificates/cert-name; ssl_client_certificate /opt/psa/var/certificates/ca-name; ssl_session_timeout 5m; ssl_session_cache shared:SSL:5m; ssl_prefer_server_ciphers on; ssl_protocols TLSv1 TLSv1.1 TLSv1.2; ssl_ciphers EECDH+ECDSA+AESGCM:EECDH+aRSA+AESGCM:EECDH+ECDSA+SHA384:EECDH+ECDSA+SHA256:EECDH+aRSA+SHA384:EECDH+aRSA+SHA256:EECDH:EDH+aRSA:!aNULL:!eNULL:!LOW:!3DES:!MD5:!EXP:!PSK:!SRP:!DSS; ssl_stapling on; ssl_stapling_verify on; ssl_trusted_certificate /etc/ssl/ocsp/domainCA.pem; resolver 8.8.8.8 8.8.4.4 valid=300s; resolver_timeout 10s; add_header Strict-Transport-Security "max-age=31536000; includeSubDomains"; <?php endif ?> |
You can see I have also added ssl_session_cache in there along with HSTS, OCSP, dhparam and ECDH Curve.
Now regenerate the conf files with…
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/opt/psa/admin/bin/httpdmng --reconfigure-all |
Your webmail will now be properly secured and you won’t get any chain issues when testing your site at ssllabs.
Please note CentOS paths are different. The psa folder is located in /usr/local/.
Thanks for reading, I am working on formatting this article better so you can copy and paste directives like previous guides, unfortunately the code tags wouldn’t wrap the above php sections.