We have a client who set up his own LAN with a Netgear router. We've not used the router but we checked that the SIPALG could be disabled and went ahead implementing three Remote(STUN) extensions at his location. He actually tested the phones at a different location, with a different router, the Netgear was brand new and bought to go in an office he moved in to a few days later. Once in the new office, the phones kept losing registration, usually right after a call, and would not reconnect without being rebooted. BLFs were never up to date, and, all in all, it was a nightmare. Soft-client remained connected so whatever the problem was was not triggered with the tunneled connection. We subsequently replaced the Netgear with a Draytek Vigor and since then everything has gone smoothly. So there's no doubt - the Netgear was causing the problem. Does anyone have any idea what the specific problem is, and, if it's possible to fix it by updating some setting i the router? I'm speculating a too-short time-out setting on UDP connections, possible in the NAT department, but this is just where I'd start looking based on the symptoms if I had access to the router, which I don't. If we can't work out if the problem is solvable, I'll have to add the router to the blacklist - which so far ONLY contains devices where the SIP ALG can't be disabled.