Originally posted by: shargus
On the server - shutdown sshd (it won't kill existing connections) then start it from the command line as: /usr/sbin/sshd -ddd
Then have the user attempt to connect again. They should get the same error, but you will get more information from the sshd daemon.
sshd is killing the connection for some reason. The debug log should show why.
We had a similar case. It turned out the client was connecting with version 1 protocols, and for security reasons the server daemon would only accept version 2.
#AIX-Forum