Difference between revisions of "Multiple SSL Virtual Hosts"

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For configuring SSL certificates per domain with Zimbra, please follow this [http://wiki.zimbra.com/wiki/SSL_certificates_per_domain guide]
 
 
Also see Multiple SSL Virtual Hosts 5.0 [[http://wiki.zimbra.com/index.php?title=Multiple_SSL_Virtual_Hosts_5.0]]
 
=Introduction =
 
It may be required to provide SSL connections to the mailstore for more than one virtual host on a Zimbra server.  While this is not natively possible with Tomcat, there is a workable solution with Apache and [[ZimbraApache|reverse proxy]] (mod_proxy).  This configuration can work with or without setting Zimbra's domain "Virtual Host" parameter and can be a great substitution for managing SSL connections with Apache instead of Tomcat.
 
 
 
= Configure Zimbra =
 
$ su - zimbra
 
$ zmprov ms `zmhostname` zimbraMailMode http
 
$ zmprov ms `zmhostname` zimbraMailPort 8080
 
$ tomcat restart
 
 
 
= Use Zimbra's CA to Generate Self-Signed Certificates for Apache =
 
Create self-signed certificates for testing the configuration. 
 
 
 
$ mkdir /etc/httpd/conf/domaina_ssl; cd /etc/httpd/conf/domaina_ssl
 
 
 
Create a certificate request.
 
$ openssl req -new -nodes -out host.zmb.moc.csr -keyout zimbra.domaina.moc.key \
 
> -newkey rsa:1024 -config /opt/zimbra/ssl/ssl/zmssl.cnf
 
 
 
Process the certificate request.
 
$ openssl ca -out host.zmb.moc.crt -notext -config /opt/zimbra/ssl/ssl/zmssl.cnf \
 
> -in zimbra.domaina.moc.csr -keyfile /opt/zimbra/ssl/ssl/ca/ca.key -cert /opt/zimbra/ssl/ssl/ca/ca.pem -batch
 
 
 
= Configure httpd =
 
 
 
Apache or Tomcat will not do name-based virtual hosting over SSL because the SSL layer is lower than the HTTP layer which results in the host header being read after the SSL handshake.  This is the major conundrum.  Please read http://httpd.apache.org/docs/2.0/ssl/ssl_faq.html#vhosts for a detailed explanation.  Separate IP addresses or listener ports must be assigned to get around the problem.
 
 
 
/etc/httpd/conf/httpd.conf:
 
NameVirtualHost *:80
 
 
 
/etc/httpd/conf.d/zimbra_proxy.conf assigning a separate IP for each virtual host:
 
ProxyRequests Off
 
<Proxy *>
 
  Order deny,allow
 
  Deny from all
 
  Allow from all
 
</Proxy>
 
<nowiki></nowiki>
 
<VirtualHost 1.1.1.1:443>
 
  ServerName zimbra.domaina.moc
 
  ProxyPass / <nowiki>http://zimbra.domain.moc:8080/</nowiki>
 
  ProxyPassReverse / <nowiki>http://zimbra.domain.moc:8080/</nowiki>
 
  SSLEngine On
 
  SSLCipherSuite ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP
 
  SSLCertificateKeyFile /etc/httpd/conf/domaina_ssl/zimbra.zmb.moc.key
 
  SSLCertificateFile /etc/httpd/conf/domaina_ssl/zimbra.zmb.moc.crt
 
</VirtualHost>
 
<nowiki></nowiki>
 
<VirtualHost 1.1.1.2:443>
 
  ServerName zimbra.domainb.moc
 
  ProxyPass / <nowiki>http://zimbra.domain.moc:8080/</nowiki>
 
  ProxyPassReverse / <nowiki>http://zimbra.domain.moc:8080/</nowiki>
 
  SSLEngine On
 
  SSLCipherSuite ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP
 
  SSLCertificateKeyFile /etc/httpd/conf/domainb_ssl/zimbra.domainb.moc.key
 
  SSLCertificateFile /etc/httpd/conf/domainb_ssl/zimbra.domainb.moc.crt
 
</VirtualHost>
 
 
 
Alternate /etc/httpd/conf.d/zimbra_proxy.conf assigning separate SSL listener ports for each domain:
 
ProxyRequests Off
 
<Proxy *>
 
  Order deny,allow
 
  Deny from all
 
  Allow from all
 
</Proxy>
 
<nowiki></nowiki>
 
  Listen 1443
 
<VirtualHost _default_:1443>
 
  ServerName zimbra.domaina.moc
 
  ProxyPass / <nowiki>http://zimbra.domain.moc:8080/</nowiki>
 
  ProxyPassReverse / <nowiki>http://zimbra.domain.moc:8080/</nowiki>
 
  SSLEngine On
 
  SSLCipherSuite ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP
 
  SSLCertificateKeyFile /etc/httpd/conf/domaina_ssl/zimbra.zmb.moc.key
 
  SSLCertificateFile /etc/httpd/conf/domaina_ssl/zimbra.zmb.moc.crt
 
</VirtualHost>
 
<nowiki></nowiki>
 
Listen 2443
 
<VirtualHost _default_:2443>
 
  ServerName zimbra.domainb.moc
 
  ProxyPass / <nowiki>http://zimbra.domain.moc:8080/</nowiki>
 
  ProxyPassReverse / <nowiki>http://zimbra.domain.moc:8080/</nowiki>
 
  SSLEngine On
 
  SSLCipherSuite ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP
 
  SSLCertificateKeyFile /etc/httpd/conf/domainb_ssl/zimbra.domainb.moc.key
 
  SSLCertificateFile /etc/httpd/conf/domainb_ssl/zimbra.domainb.moc.crt
 
</VirtualHost>
 
 
 
If being forced to supply a port number is not desired, force a redirect using mod_rewrite in .htaccess files. Append to /etc/httpd/conf.d/zimbra_proxy.conf:
 
<VirtualHost *:80>
 
  ServerName zimbra.domaina.moc
 
  DocumentRoot "/var/www/domaina"
 
  <Directory "/var/www/domaina">
 
      AllowOverride Options FileInfo AuthConfig
 
  </Directory>
 
</VirtualHost>
 
<nowiki></nowiki>
 
<VirtualHost *:80>
 
  ServerName zimbra.domainb.moc
 
  DocumentRoot "/var/www/domainb"
 
  <Directory "/var/www/domainb">
 
      AllowOverride Options FileInfo AuthConfig
 
  </Directory>
 
</VirtualHost>
 
 
 
/var/www/domaina/.htaccess:
 
RewriteEngine On
 
RewriteCond %{SERVER_PORT} !1443
 
RewriteRule ^(.*)$ <nowiki>https://%{HTTP_HOST}:1443%{SERVER_URI}</nowiki>
 
 
 
/var/www/domainb/.htaccess:
 
RewriteEngine On
 
RewriteCond %{SERVER_PORT} !2443
 
RewriteRule ^(.*)$ <nowiki>https://%{HTTP_HOST}:2443%{SERVER_URI}</nowiki>
 
 
 
Be sure to restart httpd.
 
 
 
= Related Articles =
 
[[4.x_Commercial_Certificates_Guide|4.x Commercial Certificates Guide]]
 
 
 
[[SSL_Certificate_Problems|SSL Certificate Problems]]
 
 
 
----
 
<br> Keywords: ''ssl , virtual hosts''
 
 
 
{{Article Footer|ZCS 4.5.6|5/23/2007}}
 
 
 
[[Category: Virtual Hosting]]
 
[[Category: SSL/TLS]]
 
[[Category: Pending Certification]]
 
[[Category: ZCS 4.5]]
 

Revision as of 12:06, 17 October 2014

For configuring SSL certificates per domain with Zimbra, please follow this guide

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