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Info needed on use of dummy interface to give two IPs on one e

daemon@ATHENA.MIT.EDU (KRAFT, Steven D.)
Fri Oct 27 06:40:44 1995

From: "KRAFT, Steven D." <steven.kraft@Connects.Com>
To: "'linux-net@vger.rutgers.edu'" <linux-net@vger.rutgers.edu>
Date: Thu, 26 Oct 95 17:33:00 PDT


Hello,

I need additional info on using a dummy interface to allow a server to   
have two separate addresses on one ethernet interface. The only mention   
of the dummy interface I find in the HOWTO's relates to dialup use, to   
let a local address be available even when the dialup link is down.

I have set up a Linux server (slackware 2.3, not my choice but that's not   
the issue here...) to act as an HTTP proxy using the CERN httpd.  It has   
one ethernet interface, and it needs to be reachable both from the   
Internet using its "real" Internic-registered IP address, and also   
reachable from the internal 172.16.0.0 RFC1597 private network.

The private network number is assigned to the dummy interface.  I   
followed the guidelines I saw posted a couple of months ago. (I think it   
was from Alan Cox, but I don't have the original email available just   
now).  I have not been successful in getting the Linux server to   
recognize any traffic addressed to its private network address.

Any help would be appreciated.  I can provide a listing of what has been   
done so far if requested.  Or if I should look at IP aliases instead, let   
me know that as well.

thanks,
steve

p.s. I have considered using two separate NIC's plugged into the same   
ethernet and putting one address on each card, but I would rather do it   
in software.


 --
Steven Kraft  steven.kraft@connects.com

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