How can you make a server that you created show up on the list of servers in Call of Duty first

Call of Duty: Modern Warfare 2 doesn't have dedicated servers, they are hosted by Infinity Ward.
For Call of Duty: Black Ops you can either,
1. Rent a server from a server hoster- http://www.gameservers.com/blackops/
2. Host your own server from your PC at home.
You need to open certain ports on your router and download the Black Ops server tool from Steam tools.
Hosting from your home will most likely lag.