[pptp-server] Routing PPTP tunnels

Christopher Kuhl chrisk at ciris.net
Wed Nov 3 11:06:31 CST 1999

I am having a problem with pptp tunnels when I connect from an LRP router to
an LRP router.  When the tunnel is made, I can ping each router, but nothing
on the remote network.  If I connect with a Windows machine it works fine.
I added routes on both ends back to the other, and the routing table looks
fine.  I also tryed to masq the client router, but I keep getting TCP/UDP
checksum errors(any help with this is welcome).  I really need this to work
soon.  I want to just route the trafic on the tunnel, not masq it.  I think
the problem may be in my firewall script, but I am not sure.  I have two
rules, "ipfwadm -I -a accept -W ppp1", and "ipfwadm -O -a accept -W ppp1".
If I am masq'ing trafic comes through, but I get a lot of checksum errors
and my terminal apps stall for long periods of time.  The part that stumps
me is that a Windows (they do not get masg'ed by the way) machine has not
trouble, and I can ping the local ip, remote ip, and the routers our ips
from both sides.  This leads me to believe that my firewall rules are OK.  I
am masq'ing the ppp connection to the internet, but not the second ppp
connection from the tunnel.  Has anyone got this working, and if so, how?

Chris Kuhl

More information about the pptp-server mailing list