Ok, I have to use the command line pptp client to connect to our VPN-secured WLAN (the built-in Jag client does not work, because it doesn't support chap authentication). So basically, you do a
> route add VPN-SERVER GATEWAY
> pptp VPN-SERVER local nodetach usepeerdns user USERNAME password MY_PASSWORD defaultgateway
Whenever I close my iBook or disconnect manually, I cannot reestablish a pptp-link unless I reboot. I get the following error message:
warn[open_unixsock

ptp_callmgr.c:308]: Call manager for 129.187.254.23 is already running.
fatal[callmgr_main

ptp_callmgr.c:124]: Could not open unix socket for 129.187.254.23
fatal[launch_callmgr

ptp.c:214]: Call manager exited with error 256
There is no pptp_callmgr process running from what I can tell (neither ps nor top have revealed one).
It doesn't help to delete the route by
> route delete VPNSERVER GATEWAY
So what's wrong with me manually disconnecting by ctrl-c?
(Yes, I know that there is DigiTunnel, but it is too expensive IMHO.)