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sshd[7846]: Bad protocol version identification ' ' from 192.168.0.10

I am constantly getting this message from syslog server?  Any ideas?

Syslog message:
Facility: 4 
Priority: 6 
Source: fw

Message:
sshd[7846]: Bad protocol version identification '  ' from 192.168.0.10


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Parents
  • what is 192.168.0.10 (OS, ssh client)?
    did you start the client with a verbose option?
  • 192.168.0.10 is the monitoring box that queries port 22 (ssh) to make sure that it's active.  Everytime that it checks, the firewall generates that message.

    lop, thank you for your help with my issue on SMTP Virus Checking.  I posted another reply and need your help.

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  • hi,

    what kind of 'query/monitoring' is it? if the monitoring box does just a telnet to port 22 of the ASL-box and closes without any handshaking, you'll get these syslog entries:

    ex:
    telnet fw 22

    syslog:
    Nov 27 19:19:08 fw sshd[1861]: Bad protocol version identification 'ÿôÿý^F  ' from 192.168.xxx.xxx

    maybe you should optimize your monitoring tool.

    bye,
    michael
Reply
  • hi,

    what kind of 'query/monitoring' is it? if the monitoring box does just a telnet to port 22 of the ASL-box and closes without any handshaking, you'll get these syslog entries:

    ex:
    telnet fw 22

    syslog:
    Nov 27 19:19:08 fw sshd[1861]: Bad protocol version identification 'ÿôÿý^F  ' from 192.168.xxx.xxx

    maybe you should optimize your monitoring tool.

    bye,
    michael
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