pptpd server <-> client

["Mark Maas" <mark@menem.mine.nu>]

Hi All,

I've been trying to get the pptp server (vpn server) working.
And I think I succeeded!

I can connect from outside to the server, my login is validated and the connection is established.
Syslog excerpt:

  Sep  2 18:45:15 debian pptpd[3313]: MGR: Manager process started
  Sep  2 18:45:24 debian pptpd[3314]: CTRL: Client 24.132.28.xxx control connection started
  Sep  2 18:45:24 debian pptpd[3314]: CTRL: Starting call (launching pppd, opening GRE)
  Sep  2 18:45:24 debian pppd[3315]: pppd 2.4.1 started by root, uid 0
  Sep  2 18:45:24 debian pppd[3315]: Using interface ppp0
  Sep  2 18:45:24 debian pppd[3315]: Connect: ppp0 <--> /dev/pts/2
  Sep  2 18:45:24 debian pptpd[3314]: CTRL: Ignored a SET LINK INFO packet with real ACCMs!
  Sep  2 18:45:24 debian pppd[3315]: Couldn't set pass-filter in kernel: Invalid argument
  Sep  2 18:45:24 debian pppd[3315]: CHAP peer authentication succeeded for mark
  Sep  2 18:45:25 debian pppd[3315]: found interface eth1 for proxy arp
  Sep  2 18:45:25 debian pppd[3315]: local  IP address 192.168.8.5
  Sep  2 18:45:25 debian pppd[3315]: remote IP address 192.168.8.6
  Sep  2 18:47:17 debian pppd[3315]: LCP terminated by peer (ZM-R8S^@<M-Mt^@^@^@^@)
  Sep  2 18:47:17 debian pppd[3315]: Modem hangup
  Sep  2 18:47:17 debian pppd[3315]: Connection terminated.
  Sep  2 18:47:17 debian pppd[3315]: Connect time 1.9 minutes.
  Sep  2 18:47:17 debian pppd[3315]: Sent 645 bytes, received 11207 bytes.
  Sep  2 18:47:17 debian pppd[3315]: Exit.
  Sep  2 18:47:17 debian pptpd[3314]: GRE: read error: Bad file descriptor
  Sep  2 18:47:17 debian pptpd[3314]: CTRL: PTY read or GRE write failed (pty,gre)=(-1,-1)
  Sep  2 18:47:17 debian pptpd[3314]: CTRL: Client 24.132.28.145 control connection finished

But something is wrong, I can ping the inside nic (eth0 or 192.168.8.5) and the outside nic (eth1)
but I cannot ping (or reach) any of the inside computers, for instance 192.168.8.50

Or when I try to ping google.nl after connection has been established I can see that DNS IS working! the name "google.nl" is perfectly resolved to 216.239.39.100
The result of pinging google.nl via the vpn is this:

  Q:\>ping google.nl

  Pinging google.nl [216.239.39.100] with 32 bytes of data:

  Request timed out.
  Request timed out.
  Request timed out.
  Request timed out.

  Ping statistics for 216.239.39.100:
      Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
DNS works, but the ping request's fail...

What am I doing wrong?

Mark