Hi, I have three linux machines, and I want to let one of them forward packets betwen the other two. The forwarding node has two ethernet cards, connecting the two two machines respectively. However, when I ping between the two end points, the forwarding node can receive the ping requests at its eth0, but it never forwards them to its eth1. So is the reverse direction. The forwarding node is Redhat 7.2, kernel 2.4.7-10. The two end points are FC3, 2.6.9-1.667smp. What we have done to enable IP forwarding on the RH7.2 node are: (1) In /etc/sysconfig/network, add "FORWARD_IPV4=yes" (2) "echo 1 > /proc/sys/net/ipv4/ip_forward". (3) Change "net.ipv4.ip_forward=1" in /etc/sysctl.conf. (4) "echo 0 > /proc/sys/net/ipv4/conf/eth0/rp_filter" "echo 0 > /proc/sys/net/ipv4/conf/eth1/rp_filter" (5) We tried "iptables -F" to flush the rules, but ip forwarding still doesn' work, so we add some rules as follows. We run "iptables" to configure firewall to enable IP forwarding. iptables -A FORWARD -i eth0 -o eth1 -j ACCEPT iptables -A FORWARD -i eth1 -o eth0 -j ACCEPT What are we missing, or what did we configure wrong? Thanks a lot, -Ji _______________________________________________ LARTC mailing list LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
