sshd notification in syslog

[thomas.seglard.enata (at) cnp.fr]

Hello,

since deployment of hobbit's client on 200 servers (hpux, aix, sun, 
linux), I got this message in syslog : 

Feb 13 12:05:44 psa089 sshd[9813]: Did not receive identification string 
from 158.157.156.91
Feb 13 12:06:47 psa089 sshd[9980]: Did not receive identification string 
from 158.157.156.91
Feb 13 12:07:49 psa089 sshd[10006]: Did not receive identification string 
from 158.157.156.91
Feb 13 12:08:17 psa089 sshd[10012]: Did not receive identification string 
from 158.157.156.91
Feb 13 12:08:48 psa089 sshd[10078]: Did not receive identification string 
from 158.157.156.91
Feb 13 12:09:52 psa089 sshd[10564]: Did not receive identification string 
from 158.157.156.91
Feb 13 12:10:55 psa089 sshd[10871]: Did not receive identification string 
from 158.157.156.91
Feb 13 12:11:57 psa089 sshd[10987]: Did not receive identification string 
from 158.157.156.91
Feb 13 12:13:00 psa089 sshd[11060]: Did not receive identification string 
from 158.157.156.91
Feb 13 12:13:20 psa089 sshd[11065]: Did not receive identification string 
from 158.157.156.91
Feb 13 12:14:02 psa089 sshd[11166]: Did not receive identification string 
from 158.157.156.91
Feb 13 12:15:06 psa089 sshd[11297]: Did not receive identification string 
from 158.157.156.91

Ip address is the one from my hobbit's server (158.157.156.91). This 
message do not specify that the ssh test failed, so I'm not worried about 
this. The main problem is the size of syslog and /var is growing rapidly ! 
Anyone knows how to prevent this message to be display in syslog ? 
Thank you !

Thomas Seglard
(I'm using Lotus Notes, what a challenge...)

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