set up multiple servers on one ip?

[ilovefishsticks]

Does anyone know if its possible to host multiple servers on one ip adress. I know you can on other ports besides 80, the only problem is i have been using no-ip.com and they dont let you choose another port besides 80. I wanted to buy a .com adress from ipower.com exept the only problem is i dont know if they (or any more expensive, around 7 bucks, domain selling sites) let you choose another port to run your .com adress off of. Does anyone know if its possible, and how?

 

[tripleplay905]

I use Dyndns.org, its just like no-ip, and it lets you have a constant url for you website even if your internet ip changes. And you can pick any port, just pick the port on ur server and put : then the port number (ex. tom905.dyndns.org:1030) after the url.