topic Blank window upon establishing a telnet or SSH session to the AS in Network Security

Blank window upon establishing a telnet or SSH session to the ASA5510

em — Mon, 11 Mar 2019 21:17:15 GMT

I am getting a blank window with a flashing cursor after establishing a telnet or ssh session to the ASA. I am tempted to reboot the device but want to know if anyone has sees before and what was their fix?

Regards,

Blank window upon establishing a telnet or SSH session to the AS

varrao — Thu, 25 Aug 2011 16:48:35 GMT

What is the subnet your are trying it?

On whihc interface are you doing it?

Can you share the output of show run ssh and show run telnet?

also show run aaa?

This would help resolving it.

-Varun

Blank window upon establishing a telnet or SSH session to the AS

em — Thu, 25 Aug 2011 17:05:29 GMT

I am trying it from the inside and outside...Because I can't connect to it right now, I can't do sh run...but below is the backup configuration of the ASA. This was working fine till two days ago. I can connect to it via ASDM.

telnet 10.64.148.0 255.255.255.0 inside

telnet 10.200.31.0 255.255.255.0 inside

telnet 10.210.21.0 255.255.255.0 inside

telnet 10.210.98.0 255.255.255.0 inside

telnet timeout 40

ssh 10.64.148.0 255.255.255.0 inside

ssh 10.200.31.0 255.255.255.0 inside

ssh 10.210.21.0 255.255.255.0 inside

ssh 10.210.98.0 255.255.255.0 inside

ssh timeout 40

ssh version 2

aaa authentication telnet console LOCAL

aaa authentication enable console LOCAL

aaa authentication ssh console LOCAL

aaa authorization command LOCAL

Blank window upon establishing a telnet or SSH session to the AS

varrao — Thu, 25 Aug 2011 17:08:20 GMT

What code arer you running? I though this is the first time you are configuring it.

-Varun

Blank window upon establishing a telnet or SSH session to the AS

em — Thu, 25 Aug 2011 17:14:30 GMT

8.2(3)

Blank window upon establishing a telnet or SSH session to the AS

varrao — Thu, 25 Aug 2011 17:22:38 GMT

Yes, then definitely what you can do is, remove the ssh config and re-apply it from the ASDM, or reload the ASA. There are quite a few bugs for management access in version 8.2.3 and thats why I was interested in knowing the code.

Let me know how it goes.

Thanks,

Varun

Blank window upon establishing a telnet or SSH session to the AS

em — Thu, 25 Aug 2011 17:36:42 GMT

That did it. I removed both telnet and ssh and then i added them back and it is working. Thanks indeed

Blank window upon establishing a telnet or SSH session to the AS

varrao — Thu, 25 Aug 2011 17:41:17 GMT

Hey thats great, but you might be hitting this bug in version 8.2.3:

http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCti72411

You might consider upgrading to version 8.2.3.5 or 8.2.4 to rersolve the issue once and for all

Thanks,

Varun