3 different ip configuration

YanViau · n00b Joined: 27 Jul 2006 Posts: 6

Hi,

I try to make a ez configuration on a P3 server, but it's doesnt work ... and i don't find anything about that on net.

I start my gentoo server without any ip configuration ... all of my network interface is empty ...

Login as root and type 3 ez command ...

ifconfig eth0 -inet 192.168.0.21 netmask 255.255.255.0
ifconfig eth1 -inet 192.168.0.22 netmask 255.255.255.0
route add default gw 192.168.0.1

When i run ifconfig command ... my 2 network interface have a single ip adress ... 0.21 eth0 and 0.22 eth1

it's work ... when i connect a network cable on my eth0 i can ping www.google.fr but when i ping my server with a another computer i can ping 0.21 and 0.22 and i only have 1 network cable on my gentoo server ( eth0 )

Why ?

I try the /conf.d/net with how to tuto but it's doiing the same thing ...

Thx - Yan Viau -

NeddySeagoon · Posted: Thu Jul 27, 2006 1:55 pm Post subject:

YanViau,

Welcome to gentoo.

Please describe how your network is wired and what you want to do.
_________________
Regards,

NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.

YanViau · n00b Joined: 27 Jul 2006 Posts: 6

I want to know why when I ping the IP of the NIC that doesn't have a cable plugged in the ping succeeds?

The cable is straight through, plugged in a switch.

Thanks!

NeddySeagoon · Posted: Thu Jul 27, 2006 5:13 pm Post subject:

YanViau,

The ping suceeds because the IP address is attached to the card inside your PC.
No network cable is required.
_________________
Regards,

NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.

YanViau · n00b Joined: 27 Jul 2006 Posts: 6

I ping my server with a another distant computer ... and i can ping 2 interface with 1 network cable :S ...

NeddySeagoon · Posted: Thu Jul 27, 2006 7:52 pm Post subject:

YanViau,

Your kernel will have packet forwarding turned on.
Since you have allocated two IP addresses in the same subnet, your kernel will forward packets from one interface to another.
_________________
Regards,

NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.