switch ssh connection freeze

[idanron75]

Hello evreyone :)

i have in my company Catalyst 2960 , and when i connect to the switch with ssh (useing putty), after 1 min +-

the connection freeze , and i get a message "connection refused" , it's happens while i do stuff, it's working i mange to log in and start do stuff but then just freeze.

and idea why it's happening ?

Thank you

idan

[Mark Malone]

Ok so you can access via ssh so its not an acl , can you post your show ip ssh amke sure its correct  , have you debugged the ssh while the connection  is running to see what it says when the connection breaks , whats your ssh timeout set to

check show users make sure there's not multiple sessions locked up and stored clear them if there is

If all that fails you need to check wireshark and see what exactly whats happening

[idanron75]

SSH Enabled - version 1.99
Authentication timeout: 120 secs; Authentication retries: 3

Authentication timeout: 120 secs - I'm guessing this is the problem ?  but it disconnect me even after i authenticated?

Thank you

[Mark Malone]

120 seconds is fine its default , it should not kick you out when your working on it , what ios version is running on the 2960 and can you post a debug of the output on the switch while this happens , debug ip ssh

http://www.cisco.com/c/en/us/support/docs/security-vpn/secure-shell-ssh/4145-ssh.html#debugandshowcommands

[Charles Hill]

Hello idanron75,

What is the ios?

What Putty version is being used?

There is a bug that you may be hitting.

CSCse21219

Save Bug

Management to a Cat2960 switch may hang when using ssh with putty

Hope this helps,

Please rate helpful posts.

Thanks.

[idanron75]

Thank you for the fast replay

I'm using PuTTY 0.64

the link you send me is broke, can't access it

Thank you

[Charles Hill]

I don't believe you are hitting the referenced bug with your putty version.  If it is related, wait 7 minutes after it hangs and then it will start responding again.

affected iOS is 12.2(25)

[idanron75]

The error im getting is : 

'Network erro : Software caused connection abort'

and i can log on strait after