[pptp-server] Help needed!

[m.teunissenvanmanen at chello.nl]

Somehow, a connection cannot be made. I've tried several things 
(along with a collegue) to get things right... 

Using SuSE 6.3 /var/log/messages shows:

Aug 10 18:37:00 firewall pppd[14434]: sent [LCP ConfReq id=0x1 
<asyncmap 0x0> <auth chap 05> <magic 0xc1ce56ed> <pcomp> 
<accomp>]
Aug 10 18:37:24 firewall last message repeated 8 times
Aug 10 18:37:27 firewall pppd[14434]: LCP: timeout sending Config-
Requests
Aug 10 18:37:27 firewall pppd[14434]: Connection terminated.
Aug 10 18:37:27 firewall pppd[14434]: Exit.
Aug 10 18:37:27 firewall pptpd[14433]: GRE: 
read(fd=5,buffer=804daa0,len=8196) from PTY failed: status = -1 
error = Input/output error
Aug 10 18:37:27 firewall pptpd[14433]: CTRL: PTY read or GRE 
write failed (pty,gre)=(5,6)
Aug 10 18:37:27 firewall pptpd[14433]: CTRL: Client 213.46.78.13 
control connection finished
Aug 10 18:37:27 firewall pptpd[14433]: CTRL: Exiting now
Aug 10 18:37:27 firewall pptpd[14227]: MGR: Reaped child 14433


Note: this machine is both firewall & VPN-server (with a non-private 
IP address).


So far I've tried to:
* insmod ip_gre or not
* settings on VPN client (windows 2000), which always shows: 
Error 619: The specified port is not connected right after the 
Reaped child line of Linux.

So far, I've no idea what;s causing this. Unfortunately, due to 
SuSE's somewhat strange patches, I cannot patch traceroute to 
see if it is somewhere along the line that some host might not pass 
on the GRE packets. If anyone can send me a patched source, I'd 
be very happy.

Or if you know what's wrong, you may let me know as well.

Thanks in advance.

M. Teunissen van Manen