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Re: [Nmh-workers] [OT] Strange DNS for cyrus.andrew.cmu.edu was: IMAP/nm
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From: |
Robert Elz |
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Subject: |
Re: [Nmh-workers] [OT] Strange DNS for cyrus.andrew.cmu.edu was: IMAP/nmh, again |
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Date: |
Fri, 27 Oct 2017 04:39:46 +0700 |
Date: 26 Oct 2017 13:20:29 -0600
From: "Andy Bradford" <address@hidden>
Message-ID: <address@hidden>
| I wonder what the purpose of such a configuration might be.
As a guess, the host is buried behind a NAT, and the address you get is
invented by the NAT/DNS, which remembers that there as been a query for that
host, holds the address binding for a second, to allow time for the
external host to initiate a connection, and then if there has been nothing
drops it.
NAT is just pure evil. If we could only convince the world to switch to
v6 most of these issues would all just vanish. But NAT makes too many
organisations too much profit, they don't want to let go of it.
kre