I am a fairly new Lunux user and to the redhat website. I could not find a way to append additional details to my earlier meesage. Hence I am reproducing the entire problem. I am trying to setup a test netork as follows: 172.16.4.0 ---> | eth0_inside (172.16.4.2)-- Redhat 9 Box -- eth1_toRouter (172.16.3.10)| ---> router (172.16.3.4) eth0_inside IP is 172.16.4.2. The default gateway has the eth1_toRouter's IP 172.16.3.10. eth1_toRouter IP is 172.16.3.10 and its default gateway is the router's IP 172.16.3.4. I edited the sysctl.conf file in /etc to put a value of '1' to net.ipv4.ip_forward. I rebooted the machine. Result: I can ping both interfaces, the router, and the inside hosts from the linux box. The hosts can ping only up to eth1_toRouter (172.16.3.10). Not beyond that. Your help would be greatly appreciated. Some details: Thank You for the reply. I just outputted all I could think of:- The output: [root@localhost log]# cat /proc/sys/net/ipv4/ip_forward 1 [root@localhost log]# netstat -nr Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt I face 172.16.4.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 172.16.3.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1 127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo 0.0.0.0 172.16.3.4 0.0.0.0 UG 0 0 0 eth1 [root@localhost log]# ifconfig -a eth0 Link encap:Ethernet HWaddr 00:60:97:DF:8A:82 inet addr:172.16.4.2 Bcast:172.16.4.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:246 errors:0 dropped:0 overruns:0 frame:0 TX packets:22 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:100 RX bytes:28775 (28.1 Kb) TX bytes:1488 (1.4 Kb) Interrupt:11 Base address:0xdcc0 eth1 Link encap:Ethernet HWaddr 00:06:5B:B5:86:A9 inet addr:172.16.3.10 Bcast:172.16.3.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:505 errors:0 dropped:0 overruns:0 frame:0 TX packets:174 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:100 RX bytes:45158 (44.0 Kb) TX bytes:18754 (18.3 Kb) Interrupt:11 Base address:0xdc00 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:15309 errors:0 dropped:0 overruns:0 frame:0 TX packets:15309 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:1044830 (1020.3 Kb) TX bytes:1044830 (1020.3 Kb) -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
