Hi guys,
I've just followed this tutorial :
http://blogs.23.nu/disLEXia/2004/08/antville-4485/

And when i executed the command 'ifconfig disc0 create' under centOS 5.2 , it returned with :
create : No address associated with name

What's wrong with it ? how do i create interface under centOS ?

Thank you ..

Hmm - disc0 is an interface name, and your system is unable to provide that interface.

This most likely means that a specific driver for your LAN chip / card is not loaded, or is set to come up as a differently named interface.

Have you tried substituting "disc0" with "eth0" or "eth1"?

I. e. on my FC10 system, I can do this:

which means "on the eth0 interface, set the IP adress to 169.254.255.20, the netmask to 255.255.255.0, the broadcast to 169.254.255.255, and activate (up) the interfce"

Note that the eth0 is an ethernet device - which is provided by a "kernel module" (LAN card driver) that I have loaded. Usually, if you do not pass the driver / kernel module it a startup parameter, or it is automatically loaded by your startup scripts, your ethernet device will be eth0 - if there are other ethernet cards, they are usually enumerated in order - i. e. eth0, eth1, etc.

From what you posted, you do not have "disc0" device available in your system. The tut you posted seems pretty extensive, maybe this is a software loopback or something created seperately as a step before the one you tried?

No idea... but the gist is that it appears that your system does not have a "disc0" networking device... or it does, but you need to provide an address?

What does

do?

Or a mixture of the above (with disc0 substituted for eth0) relative to my

?

I. e.

or

??

it didn't work. Btw , I forgot to tell you that I'm running the host (centOS 5.2) under User Mode Linux. And i need to create a new interface inside the host.

Thank you

This is NOT a linux command (man ifconfig) rather a BSD command. So it will not work with Centos.
You can achieve what you want by using aliased interfaces (eth0:1) or by creating virtual interfaces.
Might also want to consider VIPA.

I have successfully created eth1:0 on my centOS using this command:

and now how can I redirect traffic to the interface just like in the tutorial?(http://blogs.23.nu/disLEXia/2004/08/antville-4485/) :

I run that command and it said it has no -interface parameter in it. Does anybody know how to fix this problem ?
Thanks a lot before..

Linux uses dev instead of -interface. You would better be reading man pages.
You do:

Thank you.. now it works