[Novalug] Point multiple IPs to one server?

[David A. Cafaro]

There are three things you need to make sure are setup to host  
multiple IPs on a server:

1. Your ISP routers are configured to route the IPs to your box

2. You setup the OS (RHEL4) with the virtual interfaces for each IP  
eth0, eth0:1, eth0:2 (for three IP adddresses)

3. You setup Apache virtual hosts to deal with each IP address.

Does that help?

Cheers,
David


On Jan 2, 2008, at 6:37 PM, Joel Fouse wrote:

> I know that it's possible to have multiple public IP addresses  
> pointed at a single server, because webhosts offer static IP as a  
> value-add.  I also know that you can configure Apache vhosts to  
> listen only to specific IP addresses.  What I'm missing is what's  
> in between, if anything.  The point-multiple-IPs has to at least be  
> configured external to the box in question (at the router/switch/ 
> whatevernetworkingblackbox level), but is there any configuration  
> at the OS level to tell the box to actually listen to all of them?   
> Or does it just take in whatever's sent to it and Apache just  
> slurps up whatever you've told it to?  Is there any limit (hard or  
> otherwise) to the number of IPs that can be pointed to a single box?
>
> If it helps target any answers, I'm partly just wanting to fill in  
> my knowledge in general, and partly referring to a specific box  
> that's currently on RHEL 4.
>
> - Joel
> _______________________________________________
> Novalug mailing list
> Novalug at calypso.tux.org
> http://calypso.tux.org/cgi-bin/mailman/listinfo/novalug

David A. Cafaro <dac at cafaro.net>
Cafaro's Ramblings:  www.cafaro.net