Securing multiple ports
One single SSL certificate is able to secure multiple ports. For example, if you have an SSL certificate for webmail.xolphin.com, you will be able to configure it not only for webmail.xolphin.com:80, but also for webmail.xolphin.com:443 and the like.
It is not possible to supply a CSR (Certificate Signing Request) with a port number defined in the Common Name, as this renders it unusable. Upon receiving a CSR with a port number included in the Common Name, we are required to reject it.