What error do you get or users trying to access your site? What cable company as some will block port 8080? Try setting it up to listen on port 8080 and forward that to your server thru the router. Then specify port 8080 in your address like http://
<ip or domain-name>:8080 and see if it reaches your server. If it does, you can probably guess its not your network but your ISP then.