I am trying to run a apache webserver from behind my linksys rouer. My cable modem is Optimum Online. I cant use port 80 because the router or optimum online uses that port. So i am using port 81. I know that it is possible to run a webserver w/ all of these thing because i had done it. Then i reformatted my computer. Now everything is messed up and i cant get it to work. I have tried to do port forwarding. Port 81 ~ 81, Both, and then my computer local ip. But that didnt work. I tried DMZ host, and put my computer number in it. that didnt work either. I am not sure what else to do. The pages show up in the browser when i use the address 'http://localhost:81'. But when i use my ip address in place of localhost is doesnt work. i know others will need to use my ip to access the webserver as well.