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Re: Firewall



* Nathan E Norman (nnorman@micromuse.com) [010822 18:14]:
> On Wed, Aug 22, 2001 at 05:01:11PM -0700, Vineet Kumar wrote:
> > * Tandex (tand3x@yahoo.com) [010820 18:39]:
> > > Do I need 2 net-card on linux-gateway that use ipmasq?
> > 
> > Now on to my reply: the other reply to your question gave a wrong
> > answer. You do not need 2 NICs to route between 2 networks; there's
> > something called "one-armed routing" which makes use of IP aliasing,
> > which is giving a single NIC multiple addresses.
> 
> "Wrong" answer?  Er, this list is called debian *firewall*.  If you
> can explain to me how a machine with only one nic running ipmasq can
> properly function as a firewall, I'll consider accepting your
> criticism that my answer was "wrong".

My most sincere apologies, sir. You are indeed correct that a one-armed
router can not provide adequate security to be considered a firewall. It
came out wrong; I didn't mean to say you were wrong, but that is indeed
possible to set up a gateway using ipmasq with just one NIC (which was
the OP's question).

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