[307] in Zephyr Mailing List
Re: undead zwgcs
daemon@ATHENA.MIT.EDU (Greg Hudson)
Mon Sep 21 08:54:22 1998
To: Ken Raeburn <raeburn@MIT.EDU>
Cc: zephyr@MIT.EDU
In-Reply-To: Your message of "21 Sep 1998 04:20:52 EDT."
<tx1zpbt3mhn.fsf@cygnus.com>
Date: Mon, 21 Sep 1998 08:50:33 EDT
From: Greg Hudson <ghudson@MIT.EDU>
I wrote:
> You have to understand what's going on and think about it. The code
> was designed (not by me) with the assumption that each machine has a
> single IP address; that's not just an accident of the implementation.
Ken wrote:
> Not just data structures, but the protocol as well. The use of the
> host address (note the singular form) in the "unique id" field has
> (at least in MIT usage) turned into a sort of location indicator,
> resulting in hacked applications to spoof the value, and (I think)
> restrictions in the server on what values can be used.
This is all true, but it has been dealt with. The issue at hand is
multi-homed server machines. The protocol issue can be (and has been)
dealt with by simply making the client use the IP address of the
interface it's going to send the message with.
> I think you're looking at a non-trivial amount of development work,
Not really.
