*linksys routers*
goto
http://192.168.1.1/dmz.htm
log in box will appear, enter Admin for User and Password, or the password you changed it to.
Username: admin
Password: admin
* other routers*
Usually each router has a different ip address or a domain name.
If your not on linksys i suggest you look at the manual or goto the manurfactor of your routers website since most of them have
EASY readme/tutorials on how to access and change settings in your router.