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Date:      Tue, 29 Apr 1997 18:04:53 +1000 (EST)
From:      "Daniel O'Callaghan" <danny@panda.hilink.com.au>
To:        David Nugent <davidn@labs.usn.blaze.net.au>
Cc:        John Gunkel <jgunkel@tbf.net>, "'freebsd-isp@freebsd.org'" <freebsd-isp@FreeBSD.ORG>
Subject:   Re: virtual hosts through gateway to dummy net device 
Message-ID:  <Pine.BSF.3.91.970429180346.237D-100000@panda.hilink.com.au>
In-Reply-To: <199704290752.RAA29666@labs.usn.blaze.net.au>

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On Tue, 29 Apr 1997, David Nugent wrote:

> > # ifconfig lo0 192.168.1.1 netmask 0xffffffff alias
> > ....
> > # ifconfig lo0 192.168.1.254 netmask 0xffffffff alias
> > 
> > # route add 192.168.1.0 127.0.0.1
> > 
> > On other machines, add a route to 192.168.1.0/24 via your machine's 
> > ethernet IP address.  Of course, if you are using subnets, adjust the 
> > netmasks accordingly.
> 
> For subnets, you might run into a little difficulty. The 0xffffffff
> mask is "magic" for ip aliases. Using a different netmask may
> complicate the issue. It is probably necessary to establish permanant
> arp entries for the aliases.

I should have clarified.  The aliases are added as *host* aliases, always 
with mask 0xfffffff.  The subnet route through lo0, or from other 
machines needs the correct mask for the subnet.

Danny



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