Open TCP and UDP ports
Example for opening the TCP port 4662 and the UDP port 4672 for Emule
Create 2 news custom services port forwarding
Connection to the router setup : user = admin , password = sky
With firefox

With Internet explorer

Create Emule TCP service

Click on APPLY

Create Emule UDP service

Click on APPLY

Create 2 news rules in a firewall ( a new service appears in Service field ) and put the IP adress of the PC which has Emule

Create a new rule for the Emule TCP service
click on ADD

Click on APPLY

Click on APPLY
Create a new rule for the Emule UDP service

Click on APPLY

Click on APPLY