I just installed two network adapter into my redhat ES server. I put first card to access my VPN network & second to access internet. ok below as:

eth0-192.168.123.3 gateway 192.168.123.123
eth1:192.168.1.5 gateway 192.168.1.120

but i am unable to access both network simultaneously(VPN,Internet) when i disable a card only then i can access a network ok else not.

plz tell me what to do to access both network at same time

thanx in advance

whichever network is not used as the default route will need any additional routes explitictly setting on it. how is your box supposed to know that, for example, 192.168.100.100 lives down the VPN side as opposed to the internet side?

route add -net 192.168.100 netmask 255.255.255.0 dev eth0

sorry chirs, i didn't get you. plz clear me what u wanna advice me.
plzzzzzzzzzzz.

what's not clear? I'm sure i can give more information if you actually explain your problem to a suitable level of detail. you've not even said what "unable to access both network simultaneously" even means...

chris, i tell u details:

I hv two lan cards in redhat AS:

eth0:- 192.168.123.6 gateway 192.168.123.123 (ip address of dlink adsl router to access internet)

eth1:- 192.168.10.2 gateway 192.168.10.5( ip address of cisco router connected to VPN)

beside above i put dns server to access internet also.

ok
now both card are active, but when i want to access internet .it takes the route to 192.168.10.2 ,thr it should take 192.168.123.6 for internet access....why so?

n when i try to access vpn it takes the route 192.168.123.6 thr it should tk 192.168.10.2..!

so, that's my problem i m unable to access both service at the same time , i hv to disable a netowk card to access relevent service.

i hope it clear now...

as above you need to tell your pc which way to go to get where you want. so as you have two identical looking eth interfaces, you need to simply set the default route to go via eth0 and don't set anything about a default route for eth1. then using the example above, use the route command (or your gui of choice) to add specific, non-default routes to the system saying what else lives down eth1.

DEAR,

I am in mess, i tried to add routes to but no success. can not you tell me right commands n way to achive my goal. Hope you will help me..

i *HAVE* told you the right commands... erm.. well actually, a little syntax slip up.
says that in order to reach the 192.168.100.0/24 network, you need to use the eth0 interface.

Make route for your internet connection as default with..
& for VPN connectivity..
Thats it !!

p.s: Default routes are always used after all other static routes.

thanx chris & amit my problem is sloved..

o.. this damn problem again , linux unable to save routing list that i configured , as i restart my system all routes are flushed away..why so ?

save(copy-paste) them to any of your startup script. e.g. rc.local or any runlevel specific startup script.

or you can go through the below mentioned link for setting up persistent routes but neverthless it works the same way.(i am not sure whether it will work in other distro or not)
http://www.cementhorizon.com/wiki/in...Linux_3_RHEL_3

EDIT : updated link info.