Hi All, Sorry for all the messages

OK, I have got IPTABLES able to pass GRE and PPTP through the firewall and then back to a specified host.
However, I setup up a second host on my LAN to use a second external interface to go out on but the connection fails.

I know why but I dont know how to fix it. I tell iptables to

POSTROUTING -s 192.168.1.30 -o eth0 -p tcp --sport 1723 -j SNAT --to-source x.x.217.22
POSTROUTING -s 192.168.1.30 -o eth0 --proto gre -j SNAT --to-source x.x.217.22

I can then tell via a tcpdump that packets are not coming back in for this host, but for 192.168.1.60 which operates on x.x.217.21

Can any one help with this

Thanks so much, I shall be buying you all beers (or fruit juice)

Sounds like the limitation I mentioned.
http://www.linuxquestions.org/questi...threadid=10143

I also edited your post and changed the source IP address, just in case you used a real one.
I'm guessing it's a secure server and shouldn't be publicly announced.

/Raz

Who or what group wrote the source for GRE on Linux?

Who or what group wrote the source for GRE on linux?