On Fri, 17 Jun 2005 13:14:23 -0400 (EDT) "Ji Li" <ji.li3@xxxxxx> wrote: > 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 route add net comp1-net gw comp1-ip route add net comp2-net gw comp2-ip on router . -- *Dariusz 'tdi' Dwornikowski | Gentoo | admin at pozman.pl | *[JID]:tdi@xxxxxxxxx|[gg]:2266034|[IRC]:#gentoo-pl@freenode | *[MAIL]:tdi@xxxxxxxxx|[WWW]:www.tdi.pozman.pl | *Serwery,administracja,webapps - www.ProAdmin.com.pl | *Fingerprint:43E21CC46DAFD2F754E91547D59B39F56AAA4B5F |
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