How do you enable Port Forwarding on a ZyXEL SBG3300 Wi-Fi ADSL/VDSL Router?

+3 votes
How do you enable Port Forwarding on a ZyXEL SBG3300 Wi-Fi ADSL/VDSL Router? I recently got a ZyXEL SBG3300 Wi-Fi ADSL/VDSL Router from Afrihost to use with a Dedicated IP on a Business ADSL Package. I would like to open certain ports to use for my custom apps. I would like to open the following ports: 10055, 3389 & 9091. The Usual Suspect ports are reserved for the router's remote management (80, 21, 443).
asked Feb 18, 2015 in ADSL by theeandre (32,960 points)

1 Answer

+2 votes
Best answer
Hi Andre

Luckily the port forwarding on the Zyxel is rather easy. If you select Network Setting on the left hand side menu, then select NAT you will notice that the first section you are in is port forwarding. Select New Rule, and you will see the Port Forwarding rule box to setup and write the required rules. You need to make sure the rule is active, give it a service name, and bind it to the L2TP interface that you set up the dedicated IP to. Then enter your Start and Ending Port (3389 etc), enter the Server IP Address (This is the internal IP which you would like to forward the traffic to as well as the protocol. Once you have saved this, the forwarding rules should be set.

If you would like to test the opened ports on your dedicated IP, you can run an external NMAP on your dedicated static IP address and make sure that the ports are open on the routers receiving side.

Hope this helps (",)
answered Feb 18, 2015 by Syb3r1us (1,220 points)
selected Feb 18, 2015 by theeandre
Would you know why i sometimes get a response that the port is closed when i use an external tool to check the port like ?
Seems to work now
setup port forwarding on same roter