I am in the same boat.  I have been working with the vendor that sold us the VPN portion and they have based their solution on ipchains, yet tech support cannot find anything wrong with my firewall rules.

We have an office that uses a Linux server as a dial-on demand server for the Internet.  I am trying to connect the two users to our netowrk via the VPN, but I have not had any luck so far.

Could you post the firewall rules that you are using, or provide me with a link to the document you used to setup the firewall rules?

I'll post mine as well once I get to the site and get them copied.

Thanks for your help and hopefully we can get this resolved for both our benefits.



Jay

1st.  Go check out http://www.cag.lcs.mit.edu/~cananian/Projects/IPfwd

You will see there that IP protocol 47 datagrams are used over TCP port 1723.

Hopefully, this will help you more than it did me.  Please e-mail me if you get this to work....

I'm trying to get to where I can work from home on my Caldera eDesktop 2.4 machine (on a cable modem) VPN to our VPN server at work.   VPN at work is NT Server 4.0 SP6.  I grabbed the pptp software and compiled it.   It appears to make the connection, but when I "route add" for the internal IP infrastructure, I get an error "Network unreachable"   So sounds like  I'm in the boat with you guys.

I know it's strictly againnst the rules, but I used this tool to generate the rules that I needed for my ipchains firewall.
http://www.innertek.com/

It seems to work well.