[Vpn-help] trying to connect VPN to Zyxel 2602hwl adsl router

[Paul Webster]

Well this is working now after getting the parameters right - well, 
almost working. The link comes up and I can use it OK but after a time 
it fails. For example I was halfway though a 10 minute database update 
when it crashed. The Shrew client appears to think it is still connected 
i.e. the last line in the connect window is "tunnel enabled".

Are there any tricks to making sure the link stays up?