At 04:57 PM 1/22/2001, you wrote:
>Hello all,
>
>I'm having trouble getting ip aliasing to work. I have tried a few
>different kernels, 2.2.18-1 and 2.2.17pre6-1.
aliasing has worked since at least 2.2.x.... it's not broken.
>On my firewall, I have two nics, eth0 - private lan, eth1 - internet. I
>want to setup two private networks on eth0. Once it's setup the way I
>think it should be, I can ping the outside world, I can ping my privat lan
>#1, but I cannot ping lan #2. Ping reports 'operation not permitted'.
OK...have you read the IP-ALIASING-HOWTO? I'm going to guess that you don't
have routing properly
set up between the segments. First of all, aliasing is intended to hide a
host or network from the
rest of your lan. When you alias a network device, you a) have to set up
some routes and b) have
to tell the other hosts about the alias or they *won't* talk.
You can alias multiple addresses on a single host/nic. The second physical
device should be setup firewall fashion. You'll have to setup forwarding
and either physically
connect the two devices or use bridging.
>On my laptop (running 2.4) this works just fine. I add in the alias,
>don't even mess with the routing table, and can ping either lan.
What is the laptop connected to, a hub? Where do the cable from each nic
go? Again, sounds like
a routing problem.
>The two private lans are on the same physical network.
I do the same at home, but I use one ethernet device and a hub. You don't
have the complexity
and trafficking woes this way. Two network cards and some nifty rules make
a sane firewall however.
jk
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James S. Kaplan KG7FU
Eugene Oregon USA
[EMAIL PROTECTED]
http://www.rio.com/~kg7fu
ICQ # 1227639
Have YOU tried Linux today?
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