Use apache virtual host to redirect a subdomain to internal ip preserving passed port

I've been looking for a while to the answer to this question and I seem to find slightly different needs from people asking questions and they get wildly different answers... but none of them seem to fit my problem. I have a server that uses (successfully) mod_proxy to redirect subdomains of my main domain to other machines on my network, however I always need to specify the port like so ServerName sub.domain.com ProxyPreserveHost On ProxyPass / http://192.168.1.123/ ProxyPassReverse / http://192.168.1.123/ What I want to accomplish is to redirect any type of connection to that subdomain AND the specified port to a different machine so something like ServerName sub.domain.com ProxyPreserveHost On ProxyPass / http://192.168.1.123/ ProxyPassReverse / http://192.168.1.123/ so it would translate to sub.domain.com:1234 => 192.168.1.123:1234 sub.domain.com:5678 => 192.168.1.123:5678 etc... the documentation **official documentation ** seems to suggest it is possible by passing *:* but when I do I land on my default page on my server...