Seems like WRV200 has problem with SIP (latest .20 version). My PAP2T tries initiating session, vbuzzer.com responds, and WRV200 sends back ICMP reply 'destination unreachable. I've seen it with EtheReal tapping in between router and DSL modem. AFAIK, there's a feature called UDP hole punching which seems not to be working. Any ideas if it's a bug or security feature? Any workarounds?