I have three machines say A B and C. I want to make machine B as a router for A and C, so that the ping packets from C to A should be going via B. I have directly connected two interfaces(eth4) of A and B and similarly two interfaces(eth5) of B and C. I have even set up a route between B and C.

1. But I am not able to set a route between B and A.

2. If I ping A from eth4 of B(viceversa) it works. When I ping B from eth5 of C it works but not the viceversa.

3. Also, if I ping from C to A, B receives the packets, but not A.

I request you to kindly guide me to solve these issues.

please ask me if you require any more info.

sundar3350,

Try to resolve MAC:ip_address within computer B.

If it still doesn't meet your need create a zone (route) shared among the three units A B & C and specify the ports to use.

Good luck.

make sure you have ip forwarding turned on /proc/sys/net/ipv4/ip_forward and setting it in sysctl.conf to make it permanent

i will check these and will get back.