Finally an easy question that I can answer. If you use Apache, find your httpd.conf file and use an editor (I prefer vi) to make changes. My httpd.conf file is located in /etc/httpd/conf/httpd.conf. Near the top of the file you will see something like this. This is from my computer so don't copy.

### Main Configuration Section
### You really shouldn't change these settings unless you're a guru
###
ServerName skriptkittysecurity.cjb.net
Port 80 <-------change this
NameVirtualHost 169.147.*.*
ServerType standalone
ServerRoot /etc/httpd

After you change that you can host on a different port. Of course then you have to set firewall rules and the real fun begins.