Robert Menger <rm@keyweb.de> writes:

> ssh_exchange_identification: Connection closed by remote host

That looks like tcp wrappers kicking in.

Take a look at /etc/hosts.{allow,deny}, tcpd(8) and the PARANOID setting
in particular. I suspect that there is something wrong with the DNS
config for the addresses you have problems with.




Bjørn


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Hi Robert,

How have you configured sshd? Bind and Listen config in sshd_config?

could you please provide a
netstat -anp
with and without sshd running on the 'broken' IP/port combination

could you please provide a
ifconfig -a

Have you had a look at /var/log - are there any error entries?

have you tried connecting from the local machine to itself on that port - does that work?

What is in /etc/hosts ?

have you tried looking at a tcpdump of packets coming in and out of your interface on the sshd server?

Regards

Andrew

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