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To: Jan Grant <Jan.Grant@bristol.ac.uk>
Cc: Thomas Cannon <tcannon@noops.org>,
	"Brian T.Schellenberger" <bts@babbleon.org>,
	Clark Mankin <cmankin@harbornet.com>,
	freebsd-questions <freebsd-questions@FreeBSD.ORG>
Subject: Re: BSD network hired guns?
References: <Pine.GSO.4.31.0201181106250.13885-100000@mail.ilrt.bris.ac.uk>
From: swear@blarg.net (Gary W. Swearingen)
Date: 18 Jan 2002 12:03:35 -0800
In-Reply-To: <Pine.GSO.4.31.0201181106250.13885-100000@mail.ilrt.bris.ac.uk>
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Jan Grant <Jan.Grant@bristol.ac.uk> writes:

> 0.0.0.0 means "this host".

I don't know if 0.0.0.0 (/8 or netmask 255.0.0.0) "means" anything.  It
is a network address reserved for use as the default route in routing
tables.  The gateway associated with network 0.0.0.0 gets all the
outbound traffic that isn't explicitly routed to other networks via
other gateways (including 127.0.0.0 usually via 127.0.0.1).

(I notice that my table doesn't have a 127.0.0.0 via 127.0.0.1, but only
has 127.0.0.1 via 127.0.0.1.  That seems wrong since packets addressed
to, say, 127.2.3.4 apparently won't go to this host as they should, but
I guess that sort of thing is too weird to worry about.)

"0.0.0.0" is sometimes translated to "default" for display purposes.

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