Thanks Christoph. Ivan's workaround of --clamp-mss-to-pmtu was valid for a path MTU discovery failure where intermediate hosts refuse to forward ICMP fragmentation needed responses.
http://pptpclient.sourceforge.net/howto-diagnosis.phtml#connections_freeze In that scenario, changing network interface MTU using the mru and mtu pppd options is effective for the interface, but doesn't solve the problem, because the cause is somewhere else in the network, not on the host running Debian. Perhaps Ivan thought it could be a feature of pptp, but with Network Manager taking over these corner cases we're unlikely to take the idea upstream in pptp. -- James Cameron http://quozl.netrek.org/
