Hi,
The Fedora box (1. network): [jose@IDi ~]$ ping 192.168.236.80 PING 192.168.236.80 (192.168.236.80) 56(84) bytes of data. 64 bytes from 192.168.236.80: icmp_req=1 ttl=64 time=1.61 ms 64 bytes from 192.168.236.80: icmp_req=2 ttl=64 time=0.684 ms [jose@IDi ~]$ ifconfig eth0 | grep -i 'inet addr' inet addr:192.168.1.3 Bcast:192.168.1.255 Mask:255.255.255.0
This doesn't make much sense without a route. Can you try a traceroute to the fedora box address from the 192.168.236.80 box to see how/why it gets there?
Sure, here it is:
From fresh reboot of the Fedora14 box:
[jose@IDi ~]$ su - Contraseña: [root@IDi ~]# route add -net 192.168.236.0 netmask 255.255.255.0 gw 192.168.1.100 dev eth0 [root@IDi ~]# logout
[jose@IDi ~]$ traceroute 192.168.236.80 traceroute to 192.168.236.80 (192.168.236.80), 30 hops max, 60 byte packets 1 puente (192.168.1.100) 0.286 ms 0.260 ms 0.239 ms 2 192.168.236.80 (192.168.236.80) 0.963 ms !X 0.949 ms !X 0.930 ms !X
We know why it works this direction.
[jose@IDi ~]$ ping 192.168.236.80 PING 192.168.236.80 (192.168.236.80) 56(84) bytes of data. 64 bytes from 192.168.236.80: icmp_req=1 ttl=64 time=0.668 ms 64 bytes from 192.168.236.80: icmp_req=2 ttl=64 time=0.599 ms 64 bytes from 192.168.236.80: icmp_req=3 ttl=64 time=0.566 ms ^C --- 192.168.236.80 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2000ms rtt min/avg/max/mdev = 0.566/0.611/0.668/0.042 ms
[jose@IDi ~]$ ssh 192.168.236.80 jose@192.168.236.80's password: Last login: Sun Dec 19 20:44:44 2010 from 192.168.1.3 [jose@control ~]$
I wanted the reverse path. Traceroute from the 192.168.236.80 box back to the fedora address. It doesn't make sense that it can return packets without a route going through the Centos box.
Yes it does make sense, if the machine in the 192.168.236.0/24 has the centos box in the middle (the one with two LAN cards) as a default route, then you wouldn't need a seperate route. Packets would come back. Can you give the network settings for 192.168.236.80 ?
Can you tell us more about the network setup ? routers in both networks ? Maybe a quick drawing should make things more clear.
If you cannot set a route on the various devices it might help to use proxy-arp.
regards,
Michel