Ssh connection timed out

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http://www.unix.com – Hello, I have two AIX6.1 machines that can communicate with each other through ssh. The problem is that one of them somehow closes the connection after some time and i don't know the reason of that. For example today i send through rsync command 7 files from one server to the other. It send successfully the first 6 files but the last one failed with the following error: Code: ssh: connect to host <server_name> port 22: Connection timed out rsync: connection unexpectedly closed (0 bytes read so far) rsync error: error in rsync protocol data stream (code 12) at io.c(342) FAILURE < (HowTos)