First, you have to open the IP forwarding of the box with the two network cards. Then you have to add route using route add command gw option to 192.168.10.x network on each box that has to pass through. It is something like; route add -Host 172.24.4.x gw 192.168.10.1 for each box But every time the machines reboot you have to do it, so to avoid, put in an startup script. (note:If there are switches routers in between the networks you want to reach these you have to configure also, for back forwarding but in your case no need.) Serdar Sevengör -----Original Message----- From: redhat-list-bounces@xxxxxxxxxx [mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of Sachin Rane Sent: 06 Şubat 2006 Pazartesi 06:58 To: redhat-list@xxxxxxxxxx Subject: How to configure a network? Hi, I have a machine (say "MyBridge #1") with 2 network card. The first network card is connected to "172.24.4.0" network with IP address '172.24.4.16' and another one is connected to "192.168.10.0" with IP address '192.168.10.1'. I wanted this machine to be acted as a router/ bridge/ gateway (I am not very clear about the exact term). I wanted any machine present on "172.24.4.0" network can reach machine present on network "192.168.10.0". ------------------------------------------------------------------------ ---------- So here the list of 'route' present on the machine 'MyBridge'. [root@'MyBridge' kiran]# route Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 172.24.4.16 * 255.255.255.255 UH 0 0 0 eth0 192.168.10.1 * 255.255.255.255 UH 0 0 0 eth1 172.24.4.0 172.24.4.1 255.255.255.0 UG 0 0 0 eth0 172.24.4.0 * 255.255.255.0 U 0 0 0 eth0 192.168.10.0 192.168.10.1 255.255.255.0 UG 0 0 0 eth1 192.168.10.0 * 255.255.255.0 U 0 0 0 eth1 192.168.10.0 * 255.255.255.0 U 0 0 0 eth1 169.254.0.0 * 255.255.0.0 U 0 0 0 eth1 default 172.24.4.1 0.0.0.0 UG 0 0 0 eth0 I have set the flag "net.ipv4.ip_forward = 1" in file "/etc/sysctl.conf "of machine 'MyBridge'. ------------------------------------------------------------------------ ---------- Here is the 'route' present on machine (say 'Client #1') with IP address. [root@Client #1 Ananth]# /sbin/routeKernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 172.24.4.0 * 255.255.255.0 U 0 0 0 eth0 192.168.10.0 172.24.4.16 255.255.255.0 UG 0 0 0 eth0 169.254.0.0 * 255.255.0.0 U 0 0 0 eth0 default 172.24.4.1 0.0.0.0 UG 0 0 0 eth0 ------------------------------------------------------------------------ ---------- I can ping from 'Client #1' to machine "MyBridge #1" on both IP ('172.24.4.16' and '192.168.10.1'). But I cannot ping other machines present on network "192.168.10.0" from Client#1 e.g 192.168.10.2. Thanks and Regards, Sachin Rae ######################################################### THIS EMAIL MESSAGE IS FOR THE SOLE USE OF THE INTENDED RECIPIENT(S) AND MAY CONTAIN CONFIDENTIAL AND PRIVILEGED INFORMATION. ANY UNAUTHORIZED REVIEW, USE, DISCLOSURE OR DISTRIBUTION IS PROHIBITED.BEFORE OPENING ANY ATTACHMENTS PLEASE CHECK FOR VIRUSES AND DEFECTS.IF YOU ARE NOT THE INTENDED RECIPIENT, PLEASE NOTIFY US IMMEDIATELY BY REPLY E-MAIL AND DELETE THE ORIGINAL MESSAGE. ########################################################## -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list