Somehow I managed to patch my kernel with pptp patch. But everytime when I load modules like ip_conntrack_pptp, ip_nat_pptp, I am getting an error like "ip_conntrack_pptp.c: bad csum" in the log file. Also the pptp connections are not stable. The pptp sessions are getting disconnected very often say every 2 mins. Kernel = 2.4.20-30.9 and iptables version 1.2.9 . Please help. Regards, Manikandan. -----Original Message----- From: Luke Deryckx [mailto:luke@xxxxxxxxxxxxxxxxx] Sent: Friday, April 09, 2004 9:38 PM To: manikandan@xxxxxxxxxxxxxx Cc: Netfilter list Subject: Re: Multiple PPTP clients behind iptables. This patch worked very nicely for me as well. Keep in mind you also need to recompile iptables after you've patched your kernel. Cheers On 4/9/04 8:55 AM, "Alexis" <alexis@xxxxxxxxxxx> wrote: > yes, you need the pptp patch > > ive been in the same situation, and applying the patch made it work just > fine.- > > see > http://www.netfilter.org/documentation/HOWTO//netfilter-extensions-HOWTO-5.h tm > l#ss5.6 > > ----- Original Message ----- > From: "Manikandan" <mani@xxxxxxxxxxxxxx> > To: "Netfilter" <netfilter@xxxxxxxxxxxxxxxxxxx> > Sent: Friday, April 09, 2004 12:08 PM > Subject: Multiple PPTP clients behind iptables. > > >> Dear friends, >> >> As I am getting more confused about VPN masq., request your help on >> this. >> >> My local LAN is 10.35.0.0/24 >> My Linux box running red hat linux 9.0 with kernel 2.4.20-8. acting as the >> gateway for my LAN to Internet. >> >> I need to allow my LAN clients to access Microsoft windows VPN (Windows > 2000 >> Adv. Server) using PPTP over Internet. >> I am not able to make more than one connection to the VPN server as my LAN >> outgoing traffic to Internet is getting SNAT to single public IP. >> >> >> I read few guides and howtos to configure my firewall to allow multiple > PPTP >> sessions. But still I couldn't get through. >> >> Do I need to patch my kernel? What support do I need to enable this > multiple >> PPTP traffic. >> >> Request your views and help on this. >> >> >> Have a nice day >> >> Regards, >> Manikandan. >> >> >> >> >> >> >> >> >