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Re: Firewall



On Wed, Aug 22, 2001 at 08:56:25PM -0700, Asher Densmore-Lynn wrote:
> At 08:08 PM 8/22/01 -0500, you wrote:
> 
> >"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".
> 
> It's got a NIC and then it's running pppd over a modem or serial port,
> providing null-modem or dialup access?
> 
> (:
> 
> But that's probably cheating.

No, that's perfectly acceptable.  It's also completely unrelated to
the post that started this thread :)

Think about it though ... ppp0 is an interface.  Same with SLIP or
PLIP.  When you have two interfaces, your box is now a router, and since
all traffic in or out has to pass through you've got a firewall (it's
still up to you to configure effective firewall rules.)

One network interface using IP aliasing and ipmasq provides no
security at all.

-- 
Nathan Norman - Staff Engineer | A good plan today is better
Micromuse Ltd.                 | than a perfect plan tomorrow.
mailto:nnorman@micromuse.com   |   -- Patton

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