I would say probably not on #3 ... however, given the general NAT concept and such, having an outgoing connection could poke the hole, but this isn't how a list

I would say probably not on #3 ... however, given the general NAT concept and such, having an outgoing connection could poke the hole, but this isn't how a listening service usually works, so it would require something else. However, once the session is negotiated, then HTTP (in theory) should work, although it is stateless at that level, but anyway, this is all a lot of bother because at this point you should go ahead and do something that's less of a kludge since you're already doing NAT traversal.