Multiple MACs on a single NIC

[Gene Heskett]

On Friday 09 July 2004 16:55, chicks at chicks.net wrote:
>We're dealing with a stupid cable company in KY that won't assign
> extra IP's with each IP having it's own MAC.  Ultimately the
> machines are going to be sitting behind a FC2 firewall, but we need
> to get the IP's somehow. One solution would be to drop 5 NIC's in a
> box, but that seems pretty stupid to me.  Is there any way to have
> a single NIC respond to more than 1 MAC address?

Other than virtual eth0:x with different ipv4 addresses, I don't think
so Chris.  And thats not overly secure I've been repeatedly told.
Its also very easily detectable by the isp's who take a dim view of
such in their TOS.

But multiple machines is no problem if you are willing to setup
a system like I have here:

DSL-modem<->Wan port Linksys BEFSR41 Lan port<->eth0 in firewall<->iptables<->eth1 \
in firewall<->netgear 8 port switch port 1

netgear 8 port switch port 2<->this machine
netgear 8 port switch port 3<->100' cat5 to woodshop machine

And I still have 5 ports to expand the system with!

The linksys BEFSR41 is running in gateway mode and does the PPPoE for me.
It cost me about 80 bucks at the time I bought it over a year ago.

My firewall is an elderly 500mhz K6-III running an older 2.4.21-ck kernel

The Netgear switch was about 30 bucks a couple of months ago when I
added the woodshop box.

This box is a 1400mhz athlon I built about 4 years ago, running FC1 and
2.6.x kernels, and the woodshop box is an elderly 233mhz p2, running FC2
with all yum updates applied as of yesterday.

I have repeatedly given my outside address I can read on the lynksys's
internal page to others to scan me for vulnerabilities, and have gone
to the web pages that specialize in that but my address is a null box
to the rest of the world, no response from any port.

None, nada, zip.  I kind of like it that way.  If the script kiddies can't
detect it, they don't have a reason to muck with dead address's.  :-)
It also pretty well kills any chance I'd have to run a bittorrent client
and help out at new release time, and thats a :(

-- 
Cheers, Gene
There are 4 boxes to be used in defense of liberty. 
Soap, ballot, jury, and ammo.
Please use in that order, starting now.  -Ed Howdershelt, Author
Additions to this message made by Gene Heskett are Copyright 2004, 
Maurice E. Heskett, all rights reserved.