Topic: VPN exits, CTRL: EOF or bad error ?

[harro]

VPN exits, CTRL: EOF or bad error
I'm trying tot setup a remote win2k (PPTP) to connect to SME6. SME is behind a ADSL-router.
Portforwarding is enabled: 1723, GRE. The connection is made but after a while 3-6 minutes the
modem will hangup. VPN freezes and the server is unreachable from the WAN-side.

A log:

May 18 16:38:08 matrix pptpd[12443]: CTRL: Sending ECHO REQ id 1
May 18 16:38:08 matrix pptpd[12443]: CTRL: Made a ECHO REQ packet
May 18 16:38:08 matrix pptpd[12443]: CTRL: I wrote 16 bytes to the client.
May 18 16:38:08 matrix pptpd[12443]: CTRL: Sent packet to client
May 18 16:38:10 matrix pptpd[12443]: CTRL: EOF or bad error reading ctrl packet length.
May 18 16:38:10 matrix pptpd[12443]: CTRL: couldn't read packet header (exit)
May 18 16:38:10 matrix pptpd[12443]: CTRL: CTRL read failed
May 18 16:38:10 matrix pptpd[12443]: CTRL: Client xxx.xxx.xxx.xxx control connection finished
May 18 16:38:10 matrix pptpd[12443]: CTRL: Exiting now
May 18 16:38:10 matrix pppd[12444]: Modem hangup

Help?