I've just setup a pap2t on my network for voip purposes. It's been having problems with disconnects and also causing my network to come down. Reading the forums it seems to be a udp timeout issue. Also, everyone suggests turning off Sip under Tracking / NAT Helpers, but this option doesn't seem to be present in the TomatoUSB nousb/vpn version. Is this turned off by default, or could it still be on and there's not the option to disable it? I guess I'll take a look in a nvram dump. I've tried about everything else with Stun servers, nat options, etc, but am still having issues.