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From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no>
To: freebsd-hackers@FreeBSD.ORG
References: <200809300822.m8U8MMXV026149@lurza.secnetix.de>
Date: Tue, 30 Sep 2008 12:00:03 +0200
In-Reply-To: <200809300822.m8U8MMXV026149@lurza.secnetix.de> (Oliver Fromme's
	message of "Tue, 30 Sep 2008 10:22:22 +0200 (CEST)")
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Cc: healey.rich@gmail.com
Subject: Re: SSH Brute Force attempts
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Oliver Fromme <olli@lurza.secnetix.de> writes:
> If you're merely annoyed about the large amount of logging entries
> caused by the break-in attempts, a good solution is to move the sshd
> service from the standard port 22 to a different, non-standard port

The best choice is 443, as many corporate firewalls, especially "guest"
wifi networks, block all but a few ports (usually 22, 80 and 443, and
sometimes 25).

There are other, more complicated tricks you can play; for instance, you
could set up a web server on the box, and configure it to tunnel SSH
using the HTTP Upgrade header; this would require modifications to both
ssh (to send the initial HTTP request) and sshd (to take over the
connection from the web server).

DES
--=20
Dag-Erling Sm=C3=B8rgrav - des@des.no