On Sun, Mar 06, 2005 at 11:09:46PM -0600, Les Mikesell wrote: > On Sun, 2005-03-06 at 22:06, Todd Wohlwend wrote: > > This silly routing thing is driving me buzzonkers. I did have a typo in my > > first email concerning the gateway address of the LAN PC. The PC was > > configured correctly. Here are the correct stats and output. > > > > FC3 Soon to be Router Box : (dns-172.16.176.72) > > eth1 - ip-172.16.176.153, snm-255.255.240.0, gw-172.16.176.1 > > eth0 - ip-192.168.213.254, snm-255.255.255.0, gw-blank > > > > PC tied to FC3 eth0 NIC via crossover cable : (dns-172.16.176.72) > > eth0 - ip-192.168.213.253, snm-255.255.255.0, gw-192.168.213.254 > > > > Router box route command. > > [root@FC3-dt ~]# route > > Kernel IP routing table > > Destination Gateway Genmask Flags Metric Ref Use > > Iface > > 192.168.213.0 * 255.255.255.0 U 0 0 0 eth0 > > 172.16.176.0 * 255.255.240.0 U 0 0 0 eth1 > > 169.254.0.0 * 255.255.0.0 U 0 0 0 eth1 > > default 172.16.176.1 0.0.0.0 UG 0 0 0 eth1 > > > > /etc/sysctl.conf routing section > > # Controls IP packet forwarding > > net.ipv4.ip_forward = 1 > > > > >From the PC, I can ping itself of course, 192.168.213.254, and > > 172.16.176.153. I cannot ping anything else on the 172 network. (Note : > > The Router Box can ping all devices in the 172 network) > > If you don't NAT, the boxes on the 172 net must have a reason to route > the 192.168.213.x addresses back to your router box. If it isn't > their default gateway you need to add a route back in the router that > is their default gateway. If this isn't possible, you should add > NAT on the router box you are describing so all of the 192.168.213.x net > will appear on the other side as 172.16.178.153. > > -- > Les Mikesell > les@xxxxxxxxxxxxxxxx IMHO, this isn't about (or related to NAT). This is simple IP routing between two private networks. The information above looks fine... There's something missing... Do a "cat /proc/sys/net/ipv4/ip_forward" and see what it returns... Do an "iptables --list" and see what it returns. What Todd is describing above I've done bunches of times. There should be no magic in doing this in FC2/3 (or any other Linux/RH version). -- Cristopher J. Rhea Mayo Foundation Research Computing Facility Pavilion 2-25 crhea@xxxxxxxx Rochester, MN 55905 (507) 284-0587 Fax: (507) 284-5231
