PPTP problem with firewall
edoardo at generalsystem.net
Wed Feb 8 11:22:22 CET 2006
I have installed a firewall (IpCop 1.4.10 distribution) into
my office lan.
We have 4 vpn/pptp account on external server of our
customer for our remote assistance.
I have configured that account into my XP client and .....
- without firewall ----> all account works correctly
- with firewall -------> 3 account works correctly and 1
don't connect !!!!
Into log of my firewall I see that GRE packet from external
server with problem (which mount a CISCO PIX) are blocked
from my firewall, as it isn't able to nat (or conntrack)
If I try from another office with another linux firewall
(supported by another people) all works correctly.
Maintainer of CISCO PIX of customer with problem, connect
from his office (with a linux firewall) and vpn connection
My configuration is (you can also view modules here:
ip_conntrack version 2.1
ip_conntrack_pptp version 1.9 loaded
ip_nat_pptp version 1.5 loaded
And I have also modules
---- (other vpn/pptp works correctly)
Note that I have also forwarded input 1723 connection on my
internal PPTP server (for come-in vpn connection) whitout
What kind of problem I have????
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