On Wednesday 21 December 2005 19:25, Dan de Haan wrote: > I am trying to write some IPTABLES rules. These should be simple, but > arent working for me. What I want to do is this; > > The system has two ethernet adapters eth1 and eth2. I want it to > forward TCP traffic on a specific port from devices on eth1 to a server > on eth0. It has a dhcp client on eth0 and dhcp serve on eth1. It must > drop evertthing but ping and the packets I need forwarded. > > Can aynone give me a hint as to were to go? > > -Dan If you (as root) run the command --> iptables -v -n -L It will tell you what rules are being used and where the packets are going. After that check that forwarding is enabled. --> cat /proc/sys/net/ipv4/ip_forward If not; -->echo 1 >/proc/sys/net/ipv4/ip_forward And change /etc/sysctl.conf # Kernel sysctl configuration file for Red Hat Linux # # For binary values, 0 is disabled, 1 is enabled. See sysctl(8) and # sysctl.conf(5) for more details. # Controls IP packet forwarding net.ipv4.ip_forward = 1
