[Novalug] Point multiple IPs to one server?
David A. Cafaro
dac at cafaro.net
Wed Jan 2 18:53:09 EST 2008
Oh, and according to my quick search looks like there may be a limit
of 4096 IP address per interface, but I'm not 100% on that. Chances
are that any limit is way out of any reasonable use you would run
On Jan 2, 2008, at 6:47 PM, David A. Cafaro wrote:
> 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?
> 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
> David A. Cafaro <dac at cafaro.net>
> Cafaro's Ramblings: www.cafaro.net
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David A. Cafaro <dac at cafaro.net>
Cafaro's Ramblings: www.cafaro.net
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