Enable upnp on a router that doesn't have the option
I recently got a Motorola NVG510 (from AT&T, they changed our internet plan and sent a new router) and since then I've had problems with Skype. I think I've narrowed the problem down to there being no upnp on this router to enable, and Skype doesn't like that.
So, is there any way I can make this option available, or some other way to 'simulate' upnp so Skype will play nice? I read somewhere else that "IP Passthrough" may be an option, but I'm unsure about that.