[perfectboy]

Also it's not always the issue. Sometimes it's an issue from ISPs side not yours. If you think you have configured everything correctly still it dosent work. Contact you ISP about a static IP and port forwarding . Often residential connections have NAT and also tend to disallow incoming connections.

So things to consider before you decide on using your home pc as a server.

1. Does you connection have a static IP.( Well there are workaround for this)
2. Does your ISP allow incomming connections.( If it does not allow u cannot do anything)