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SSH/whatever issue

From: Thomas Schwinge
Subject: SSH/whatever issue
Date: Mon, 4 Aug 2008 11:03:11 +0200
User-agent: Mutt/1.5.11


On zenhost (GNU/Linux system, Xen dom0) there are (finally...) two domUs
running, GNU/Hurd ones.

Internally-invoked (from the domUs) internet traffic is no problem
(apt-get and friends work just fine).

Incoming connections to the SSH ports do not get through, though.  Even
if trying to connect directly from zenhost itself.  And this in a very
strange way:

    tschwinge@zenhost:~ $ nc 22
    SSH-2.0-OpenSSH_5.1p1 Debian-2

Good so far.  But:

    tschwinge@zenhost:~ $ ssh
    Connection closed by

And now for the really strange thing: sshing from one of the domUs to the
respectively other one DOES work again, without any problem!  Also, from
one of the other machines in the ethernet network, I can connect to the
two domUs.  But not from zenhost/the dom0 itself.  Is this some Xen
networking oddity?  (But why can nc connect?)

Unfortunately I have to leave right now, so I can't investigate further.
Perhaps Samuel knows the obvious?


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