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how to disable showing SSHversion to Putty client in Cisco

Posted on 2011-09-14
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Last Modified: 2012-08-14
hi expert,

Once SSH is enabled in Cisco, when we try to access via Putty , in Putty event log, we can see SSH version detail of the Cisco router. Can we disable that not to show to SSH client in Cisco router? I've attached file for you to more understand.
ssh.JPG
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Question by:bominthu
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Expert Comment

by:parparov
ID: 36537342
As this discussion shows:
http://www.linuxquestions.org/questions/slackware-14/how-to-hide-openssh-version-331399/

You cannot hide the version negotiation (it has importance); as of putty showing it, again, it is a standard verbosity setting. You can patch putty software though, since it is open source.

Also you may try turning the putty log off completely, or look more into the doc:
http://the.earth.li/~sgtatham/putty/0.61/htmldoc/Chapter4.html#config-logging
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by:bominthu
ID: 36537457
What I'm trying to do is in Cisco router. Not in Putty.

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Expert Comment

by:parparov
ID: 36537945
Do you have debug turned on for ssh connections in cisco?

Consult this page:
http://www.cisco.com/en/US/tech/tk583/tk617/technologies_tech_note09186a00800949e2.shtml#debugandshowcommands
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by:bominthu
ID: 36538431
turned on or off doesn't matter. No matter what I set, I still can see SSH version in Putty event log before I log in to device .

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parparov earned 2000 total points
ID: 36538546
Then it is probably non-toggling.
Your last resort would probably be Cisco support, but I don't think they would also be able to help you.

Sorry.
If I may ask, what is the purpose of the version hiding for you?
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