From owner-freebsd-net@FreeBSD.ORG  Mon Jul 24 13:48:14 2006
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Date: Mon, 24 Jul 2006 14:48:10 +0100
From: Brian Candler <B.Candler@pobox.com>
To: Nikos Vassiliadis <nvass@teledomenet.gr>
Message-ID: <20060724134810.GA4511@uk.tiscali.com>
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Cc: freebsd-net@freebsd.org
Subject: Re: using loopback address as primary address
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On Mon, Jul 24, 2006 at 12:38:56PM +0300, Nikos Vassiliadis wrote:
> Can I somehow use lo1 address
> for connections initiated from Host_2?

Options I know of:

(1) the application which originates the connection can explicitly bind
to the lo1 address (see for example telnet -s and ping -S options)

(2) the application can run in a jail(8) whose IP address is lo1, in which
case a 'bind to any' will bind to this address only

(3) use source NAT with pf etc