Hi There,
When you say WAN IP address i assume you mean public IP address ?.
Well that's what i have entered and changed the port to 8181, then in a webpage i enter http://##.##.###.##:8181.
But i get nothing, as for the manual all it says is the following.
To change the Router’s port number use the Web Port field. Click Apply to set your new password. This window will also allow the user to enable remote management of the device from a remote computer, either through the web management or through Telnet. To configure this function, click the Enabled radio button under the Remote Management heading, enter the IP Address of the computer you wish to allow to remotely configure the Router, along with the corrsponding SubnetMask (Netmask). Click Apply to set these configurations into the memeory of the Router.
Cheers.
Top-Dad