Forward traffic from one subnet to another.

airbornecow711 · 01-22-2012, 11:18 PM

I have been searching the forum and wrecking my brain on this problem. I hope you all can help. Here is my network layout.

banana
eth0 192.168.2.6
255.255.255.0

grape
eth0 10.1.10.5
255.255.0.0
eth1 192.168.2.5
255.255.255.0

orange
eth0 10.1.10.4
255.255.0.0

I am trying to establish a network route from orange to banana by using grape as a gateway. I have tried static route and ssh tunnels, but there is no route from orange to banana. There is a route from orange to grape and grape to banana. Thanks in advance.

ukiuki · 01-22-2012, 11:33 PM

Are you running iptables on grape? You need the rules to forward traffic from banana to orange and vice versa.
https://help.ubuntu.com/community/IptablesHowTo
http://linux.die.net/man/8/iptables

airbornecow711 · 01-22-2012, 11:46 PM

Thanks for the quick reply. yes. i rule out iptables and tcp wrappers. I can get traffic flowing by using iptables/masquerade/ip forward/static routes if the grape interfaces were reversed (eth0: 192 subnet, 10 subnet). I just need some guidance. Any other advice would be appreciated.

ukiuki · 01-24-2012, 01:23 AM

Ok i found this might come in hand if you havent yet.
http://www.linuxquestions.org/questi...ubnets-750954/

Regards