authlog: showing the message "sshd[18620]: [ID 800047 auth.info] Did not receive identification stri

Hi,

Involved systems:

- SunOS 5.10 Generic_142910-17 i86pc i386 i86pc -> destination

- SunOS 5.10 Generic_144489-10 i86pc i386 i86pc -> source

The source server is initiating sftp connections to the destination server (using ssh key) and the connection can be established most of the time however, few times it can't and the message is showing in the /var/log/authlog "sshd[18620]: [ID 800047 auth.info] Did not receive identification string from x.x.x.x"

Port 22 is being used.

Any idea?

Thank you

L.