I have to say I was a bit confused. It took a while to find anything. I've found instructions to the Voyager BT 205 & BT 2000 (but it's not called Voyager) & a review which discusses your setup. About 2/3 way down that review article it discusses 'Configuration of Port Forwarding' & 3/4 down the page 'Universal Plug and Play (UPnP)' see here: http://www.adslguide.org.uk/hardware...q3/bt-2000.asp This article also discusses how to allow access thru the Firewall for apps. So you'd need to apply the same principle.

As I said the only one with the name Voyager was this one: Voyager BT 205 instructions But this is not your model. I'm guessing that the softw on the review article is an updated version of the one below. So, take the instructions here: Binatone ADSL 2000 port forward instructions

I hope this is ok for you. Sorry I was not as direct with my instructions.