[381] in linux-net channel archive
Re: Feature/hack for multi-homed hosts (esp. ifconfig alias)
daemon@ATHENA.MIT.EDU (H. Peter Anvin)
Sat May 27 16:39:48 1995
To: submit-linux-dev-net@ratatosk.yggdrasil.com
From: hpa@asgard.yggdrasil.com (H. Peter Anvin)
Date: 27 May 1995 19:52:00 GMT
Reply-To: Peter.Anvin@linux.org (H. Peter Anvin)
Followup to: <m0sFKFQ-0000XQZ@chiark.al.cl.cam.ac.uk>
By author: iwj10@cus.cam.ac.uk (Ian Jackson)
In newsgroup: linux.dev.net
>
> There is currently a small problem when trying to use ifconfig alias
> or dummy devices or just plain multiple interfaces to give their
> machine several IP#'s which respond differently to incoming
> connections.
>
> Most TCP/IP-based programs aren't aware that there is a decision to be
> made about which local address to bind to, and just pass `bind'
> all-zeroes in the IP# field. This causes the resulting socket to
> listen on all the machine's interfaces.
>
This isn't a problem, at least not IMHO. In fact, this is *exactly*
what the program wants - bind to all existing IP local addresses.
This is most frequently requested for httpd, and there *are* properly
modified version of httpd (Apache, for example). One program,
however, which probably should be modified is inetd, for obvious reasons.
/hpa
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