multiple ip addresses on 1 nic?

houler · 04-25-2005, 05:17 PM

Here's the scenario, nothing serious, just curious:

My friend owns a Gaming server. He has multiple ip addresses and it's set to 1 box/1 network card which is running Linux (backbone is a OC-192).

So when people connect to 66.78.38.243 it'll go to that box, and when people go to 66.245.87.75, it'll go to the same box, and when people go to 66.87.24.32 it'll go to the same box, and so on and so forth. Again the box has only 1 network card.

What's the process on setting that kind of thing up? (details are much appreciated)

Of course you have to purchase those ip addresses from the provider, right?

I think that's pretty cool.

Mara · 04-25-2005, 05:20 PM

It's simple. Instead of eth0 you use eth0:1, eth0:2 and so on (with one address assigned to eth0). It works good, but there are small issues with iptables for example (when you want rules for specific virtual interfaces; last time I tried it didn't support eth0:x, only 'real' interfaces).

houler · 04-25-2005, 05:23 PM

Quote:

Originally posted by Mara
It's simple. Instead of eth0 you use eth0:1, eth0:2 and so on (with one address assigned to eth0). It works good, but there are small issues with iptables for example (when you want rules for specific virtual interfaces; last time I tried it didn't support eth0:x, only 'real' interfaces).

Awsome. So all I have to do is purchase an ipblock. and I can set it up like that?

javaroast · 04-26-2005, 01:49 PM

Try using the command ip addr add xxx.xxx.xxx.xxx/xx dev ethX and you won't have to deal with the subinterfaces.

Mara · 04-26-2005, 04:53 PM

Quote:

Originally posted by houler
Awsome. So all I have to do is purchase an ipblock. and I can set it up like that?

Exactly