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Date:      Tue, 14 Dec 1999 01:24:52 -0500
From:      Pierre Chiu <pccb@yahoo.com>
To:        freebsd-security@FreeBSD.ORG
Subject:   Re: Why use a Firewall?
Message-ID:  <3855E2B4.59CDD2FD@yahoo.com>

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>Spoofed addresses for one thing.  There are many reasons. Sometimes if
>anything to protect known vulnerable services, and to limit access to
>services that do not warrent public exposure.  These days, you really
need
>to run one.  I suggest browsing through your book store's computer
security
>section.
>
>        ---Mike
>Mike Tancsa  (mdtancsa@sentex.net)
>Sentex Communications Corp,
>Waterloo, Ontario, Canada
>"Given enough time, 100 monkeys on 100 routers
>could setup a national IP network." (KDW2)

I don't think firewall can stop spoofed ip.
It can stop non-routable ip like (192.168.1.1), but if your ip is
24.112.1.1 and you spoofed it as 24.118.1.1, I doubt firewall can detect
it.


Peter Chiu



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