Hi Maciej >@2003.10.09_16:03:26_+0200 > > Are there any iptables extensions out there that allow you to clear the DF > > (Dont Fragment) bit in ip headers? > AFAIK no. Why would you want to do that? > I think I might write a module that would do that. I need it for tunnels. In a perfect world that wouldn't be necessary at all, but reality is that there's many brain dead admins that filter icmp, so if you build a tunnel over the big bad internet, you're screwed. You can use the TCPMSS target which solves it for tcp, but you still have the same problem with udp packets, so imho the only way to solve this properly is to fragment packets even if DF=1. -- Regards Abraham Ask not for whom the telephone bell tolls... if thou art in the bathtub, it tolls for thee. ___________________________________________________ Abraham vd Merwe - Frogfoot Networks CC 9 Kinnaird Court, 33 Main Street, Newlands, 7700 Phone: +27 21 686 1665 Cell: +27 82 565 4451 Http: http://www.frogfoot.net/ Email: abz@xxxxxxxxxxxx