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Date:      Thu, 20 May 1999 13:47:13 -0700 (PDT)
From:      Roger Marquis <marquis@roble.com>
To:        freebsd-isp@FreeBSD.ORG
Subject:   Re: ifconfig_if0_alias?
Message-ID:  <Pine.GSO.3.96.990520133018.22203A-100000@roble2.roble.com>
In-Reply-To: <19990520160813.A15580@infoteam.com>

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> for h in $aliases1; do
>    ifconfig fxp0 inet 207.246.84.$h netmask 255.255.255.255 alias
> done

This will work assuming no deamons are expecting to listen on those
interfaces before they are created.  One place where you might see a
problem is with inetd, named, or any_other_d configured in /etc/rc.conf
when the ifconfig_aliases are defined in /etc/rc.local or
/usr/local/etc/rc.d.  I use rc.conf for IP aliases for this reason.

Another problem with FreeBSD aliases is routing.  For reasons which are
not clear "ifconfig alias" doesn't automatically create a local route
to the IP.  With FreeBSD 2.2.8 and earlier at least this must be done
manually:

  for h in $aliases1; do
  	route add 207.246.84.$h 127.0.0.1
  done

--
Roger Marquis
Roble Systems Consulting
http://www.roble.com/



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