I have read a post on Waffel’s Blog how you can setup a certificate for multiple namebased servers on Apache. It is simple to manage within Eisfair.

• Choose “Service Administration” -> “Certs service” and select “Manage certificates”.
• Now enter “1” for key type and choose your webserver.
• Select “11” to create a new certificate request. The request will be stored to /usr/local/ssl/csr/apache.csr.
• Open another terminal and switch to /usr/local/ssl
• Create an extension file extension.txt using vi, as described in Waffel’s blog and enter your server names at the end.
• Execute openssl x509 -req -days 365 -in apache.csr -signkey private/apache.key -out newcerts/apache.crt -extfile extension.txt -extensions mydomain_http
• Select “14” (Manage certificates) to create a .pem file from the new certificate.
• Use apache as SSL_CERT_NAME on the Apache configuration for every virtual server which you have included into extension.txt