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Date:      Sun, 12 Jun 2005 10:21:49 +0900 (JST)
From:      Tod McQuillin <devin@spamcop.net>
To:        Peter Jeremy <PeterJeremy@optushome.com.au>
Cc:        Jack Raats <jack@raats.xs4all.nl>, FreeBSD Stable <freebsd-stable@freebsd.org>, freebsd-questions@freebsd.org
Subject:   Re: Strange error
Message-ID:  <20050612101718.I62965@plexi.pun-pun.prv>
In-Reply-To: <20050611192356.GA50157@cirb503493.alcatel.com.au>
References:  <00a301c56dfc$cb84c770$9d00000a@jara2> <20050611192356.GA50157@cirb503493.alcatel.com.au>

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On Sun, 12 Jun 2005, Peter Jeremy wrote:

> On Fri, 2005-Jun-10 22:41:36 +0200, Jack Raats wrote:
>> This day I've a very strange error when trying to connect to my FreeBSD machine (4.11-STABLE)
>> I got the following error:
>> ssh_exchange_identification: Connection closed by remote host
>>
>> Can anyone give me any clue what's wrong?

I missed the start of this thread but this sounds like tcpwrappers closing 
the connection.

Check your /etc/hosts.allow and look in /var/log/messages for a message 
like:

May 31 12:18:36 hostname sshd[1594]: warning: /etc/hosts.allow, line 32: can't verify hostname: getaddrinfo(1.2.3.4.example.com, AF_INET) failed
May 31 12:18:37 hostname sshd[1594]: refused connect from 1.2.3.4 (1.2.3.4)

If you see something like that you can change the entry in your 
/etc/hosts.allow to allow ssh connections from that specific IP or 
netmask.

see hosts_options(5) for details.
-- 
Tod McQuillin




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