Multiple SSL Virtual Hosts
Configure Zimbra
$ su - zimbra $ zmprov ms `zmhostname` zimbraMailMode http $ zmprov ms `zmhostname` zimbraMailPort 8080
Use Zimbra's CA to Generate Self-Signed Certificates for Apache
$ 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.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> <VirtualHost 1.1.1.1:443> ServerName zimbra.domaina.moc ProxyPass / http://zimbra.domain.moc:8080/ ProxyPassReverse / http://zimbra.domain.moc:8080/ 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> <VirtualHost 1.1.1.2:443> ServerName zimbra.domainb.moc ProxyPass / http://zimbra.domain.moc:8080/ ProxyPassReverse / http://zimbra.domain.moc:8080/ 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> Listen 1443 <VirtualHost *:1443> ServerName zimbra.domaina.moc ProxyPass / http://zimbra.domain.moc:8080/ ProxyPassReverse / http://zimbra.domain.moc:8080/ 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> Listen 2443 <VirtualHost *:2443> ServerName zimbra.domainb.moc ProxyPass / http://zimbra.domain.moc:8080/ ProxyPassReverse / http://zimbra.domain.moc:8080/ 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>
