Jeff Vian wrote:
On Fri, 2005-03-11 at 15:07 -0800, Aaron O'Hara wrote:
On Fri, 2005-11-03 at 23:56 +0100, Alexander Dalloz wrote:
Am Fr, den 11.03.2005 schrieb Aaron O'Hara um 23:26:
I have my firewall connected to my cable modem with one a single NIC.
(I have another NIC for my LAN). My public NIC is set to DHCP an
address from my ISP.
Is it possible with Fedora to setup multiple virtual adapters that have
unique MAC addresses (that I generate) that all DHCP an address from my
ISP? This way, I'd have multiple public IPs bound to one physical
adapter.
You really think the ISP would assign you several IPs this way? I don't
believe that. At least it would be some kind of misuse.
I suggest you ask your provider for official possibilities or rent a
server with multiple public IPs in a computer center (rack center).
Alexander
My ISP officially allows for multiple dynamic IPs on a single account
(Shaw in British Columbia, Canada). It's an official option, but
currently requires 1 NIC per IP. I already have 3 public IPs spread
over 3 machines. I want to amalgamate them to one 'box' for centralized
firewall purposes.
Maybe someone with definitive information can chime in here, but AFAIK
an IP is tied to the adapter by MAC address.. Unless you have a device
with a different MAC address it always seems to get just one IP no
matter how many times you make a lease request.
It rather depends on the DHCP server implementation. The vast majority
use MACs to index into their lease table, so there's generally a
one-to-one correspondence between MACs and leased IPs, but I don't think
that's a requirement.
Note that some NIC drivers allow you to bugger the MAC address, but I
wouldn't recommend it (it can wreak havoc on ARP tables and such).
Witness the unmitigated disaster that is Windows clustering with their
(rolling eyes) wonderful "virtual" MAC address creation...grrrr!
Aliased interfaces would still have the same hardware address, so I
don't see how this would work.
Again, it depends on the DHCP server in use and what its rules are.
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