Originally posted by: Miztiik

Hi All

When i try to connect to one of my server i get this error message,
connection failed : "ssh_exchange_identification: Connection closed by remote host"

What could be wrong.
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Helping to weave a better web

Originally posted by: tony.evans

"What could be wrong."

Hundreds of things. What steps have you so far taken to identify the cause so we don't go over old ground?

Originally posted by: jnordtome

It looks as if the destination machine can't verify the name of the sending machine through IP lookup. On the destination machine, verify that you can do a reverse lookup of the sending machines IP address.

i.e. sending machine is called servA with ip 192.168.2.1. On the destination machine, do an "nslookup 192.168.2.1" and verify it returns servA. You should also try "host 192.168.2.1".

Originally posted by: Miztiik

Yes, the destination can lookup the host.

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Helping to weave a better web

Originally posted by: jnordtome

You could try running ssh with the verbose option, i.e. "ssh -vvv user@servA"

Also, if it's possible, you can stop sshd on the destination server and run it from line command with the -d option. This should give a little more information as to what the destination server sees.

Originally posted by: Huasteco

 

 

I  find this link

 

http://aixblogs.blogspot.mx/2009/04/sshexchangeidentification-connection.html