I am a graduate student in department of computer science at colorado state university. I am setting up following Topology N/W in which Machine 2 Linux Box has to forward packet between two different subnets,

#################                          ######################                     ###################

Machine 1 ( Solaris Box) ----------------   Machine 2 (Linux Box)   --------------------   Machine 3(Solaris Box)

192.168.0.1                                                 10.0.0.1(eth0), 192.168.0.101(eth1)                 10.0.0.101

####################                    #####################                       ####################

 

Machine 1 and Machine 3 are on different subnet.

from Machine 1 and 3  I can ping both interfaces of  Machine 2 Linux Boxes. But I am unable to Ping Machine 3 from Machine 1 and vice versa. I have tried to make my Machine 2 Linux Box as Router, I have made static entries in the kernel routing table as well. But still problem persists. I am not sure if I am missing anything in the configuration of Linux Box as a router. Can anyone  please tell me where I am making mistake. Thanks Tarun