Unable to SSH after firmware update

Hello thanks for choosing Dell.

I'm thinking if the firmware update might have overwritten cypto keys... so could you try configuring SSH one more time in the switch and tell us what you see? Wish you a good weekend.

I reconfigured the ssh twice on my machine. I restarted the switch using GUI or removed power. Every time after restart I am unable to ssh. I don't see any error message while reconfiguring.

Followed How to enable HTTPS/SSH and disable HTTP/Telnet for switch management on PowerConnect 5500 series switches | Dell US.

 

When "copy running-config startup-config" command I type I don't press anything because by default it is true right?

I noticed that keys are already saved every time I have to reconfigure ssh. I only have to do " ip ssh server" and "copy running-config startup-config"

 

 

Hello mayanksriv007,

 

You should use:
Enable HTTPS/SSH and disable HTTP/Telnet for switch management on PowerConnect 3500 series switches.

https://dell.to/46m2TBO

But the directions are the same as the 5500, I just wanted to provide this one to you.

 

Yes you need to hit Enter on the command  console#copy running-config startup-config

Then reload.

Thanks for sharing the link, yes steps are exactly the same.

I reconfigure and did copy running-config startup-config again and press Enter button. Still, the results are the same I cannot ssh after restart.

Hello mayanksriv007,

 

Did you test SSH to work after configuration and successful before reload?

 

What version firmware are you on?

Are you on the latest?  : https://dell.to/3CMgPHq

 

If SSH is disabled again, can you test telnet see if it works?

I upgraded it to 2.0.0.68 from 2.0.0.40.

Can we enable ssh from the web browser?

And can you tell me the command to check the openssh version? Or tell what is the version of ssh in the fw

Hello mayanksriv007,

 

Were you able to test the configuration before copying to startup-config?

If it did not work can you post any errors you received?

 

show ip ssh

Will show Version SSH version number

 

SSH commands are shown here page 407 but not as clear as the instructions you already have

https://dell.to/3pvMFVQ

 

console# show ip ssh
SSH Server enabled. Port: 22
RSA key was generated.
DSA(DSS) key was generated.

SSH Public Key Authentication is disabled.

Active incoming sessions:

IP address SSH username Version Cipher Auth Code
----------------- -------------- ----------- ----------- --------------
192.168.60.177 westtel SSH-2.0-MoT aes256-cbc hmac-sha1
TY_Release_
0.76

Does "SSH public key authentication is disable" has to do something with the ssh issue?

Hello mayanksriv007,

 

Try this command

 

ip ssh pubkey-auth

    Enables public key authentication for incoming SSH sessions

 

Syntax

• ip ssh pubkey-auth

• no ip ssh pubkey-auth

 

Thanx,

One last question can we enable/disable ssh from the web browser using Dell OpenManage Switch Administrator?

Hello mayanksriv007,

 

I think it is command line only.

I don't have OpenManage Switch Administrator to view PowerConnect 3524 myself.

Try the in line help, the question mark in the top right corner.