topic Re: WLC not accessible via SSH in Wireless

WLC not accessible via SSH

CarloCrz — Mon, 05 Jul 2021 19:47:02 GMT

Hi everyone,

I have a Cisco WLC 2504 that doesn't allow me to access via SSH. The network is ok, I can access via web GUI and console cable. The configuration seems correct too.

C:\Windows\system32>telnet 10.x.x.x 22
Connecting To 10.x.x.x...Could not open connection to the host, on port 22: Connect failed

Same result if I try to access with a client (I use MobaXterm)

Thank you

Carlo

Re: WLC not accessible via SSH

Mark Elsen — Thu, 12 Nov 2020 17:02:54 GMT

- Verify the issue with another ssh-client such as Putty, and or run the intended client in debug-mode , see what happens.

Re: WLC not accessible via SSH

Sandeep Choudhary — Thu, 12 Nov 2020 17:57:46 GMT

which software version you are using on wlc?

As mentioned by others, you should try some other terminal Emulators (ZOC or putty).

Regards

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Re: WLC not accessible via SSH

Scott Fella — Thu, 12 Nov 2020 17:57:50 GMT

You are using telnet. Like Maeve mentioned, use another tool. I use SecureCRT but Putty is free.

Re: WLC not accessible via SSH

CarloCrz — Fri, 13 Nov 2020 08:55:07 GMT

Thank you for the replies, I tried to connect via SSH with Putty with the same result, the firmware version is the following:

Software Version 8.5.135.0

Re: WLC not accessible via SSH

Mark Elsen — Fri, 13 Nov 2020 10:43:18 GMT

- Post exact error message returned when using Putty , and also as stated enable debugging -> a common cause for this is a(n) (available) cipher mismatch between the ssh-client and ssh-server. A linux ssh client offers the most flexible way for enabling debugging. Check this article :

https://centrify.force.com/support/Article/KB-5452-How-to-enable-debug-for-PuTTy-SSH-clients

Re: WLC not accessible via SSH

Scott Fella — Fri, 13 Nov 2020 17:43:19 GMT

Maybe you need to re-generate your certificate. I also use MobaXterm with no issues on that version or code and or any of the 8.5 version I have tried on the 2504.

MANAGEMENT -> HTTP-HTTPS -> "Regenerate Certificate”

Then you will need to reboot.

Re: WLC not accessible via SSH

CarloCrz — Mon, 16 Nov 2020 13:41:24 GMT

Thank you for the suggestion, I have done it, the log file is not created (but as far as I know, I should see the log messages on the window, and I don't), the only thing that I receive is as follows:

I know it looks like a possible network problem, but my PC is on the same subnet as the WLC, with no firewall in the middle. There are many other network devices all in the same subnet and this is the only one that I'm not able to connect to.

Carlo

Re: WLC not accessible via SSH

NareshV — Wed, 04 Oct 2023 10:14:53 GMT

Hi Carlo,

Even I have faced this issue. Resolved the SSH Issue by configuring the Session timeout in Delft WLC. Previously Idle Timeout (minutes) was “0”, I have changed it to 160 min.

SSH connection attempts to the WLC fail immediately with any of the following messages at the SSH client: "Connection reset by peer"

"ssh_exchange_identification: Connection closed by remote host."

Output of "show loginsessions" and GUI don't show any active SSH session:

>show loginsession

ID User Name Login Type Connection From Idle Time Session Time

-- --------------- ---------- --------------------------------------------- ------------ ------------

00 admin Serial EIA-232 00:00:00 00:03:00

Refer the link: https://bst.cisco.com/quickview/bug/CSCvv22531