[iMAK]

I always update the firmware through ssh, currently I am on r50927 but can't access (ssh root@ip) in CMD and I get (Connection closed by ip port 22).

I haven't changed any settings in the router, Administration>Management>Router Management>SSH Management is enabled, Remote Port is 22.

Services>Secure Shell (SSH)>Enable Daemon> enabled, Port is 22.

I disabled the above and enabled them, rebooted the router but still.

Any help?

[ho1Aetoo]

https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=333334&start=0

[iMAK]

I used Putty and it just worked, thanks for the tip.

I just entered the router ip and accepted the message and I could access the router through ssh, and upgraded the firmware.

But why I am not able to access through CMD as I used to before? Even in the latest build I can't.

[ho1Aetoo]

In the posts I quoted everything is explained even how to delete the fingerprint when you use Linux CLI ssh

the post of egc refers to windows users
and my post refers to linux CLI users

To explain again.
Each ssh server sends a fingerprint, the fingerprint is stored by the clients (under linux in the ~/.ssh/known_hosts)
Since the router now uses a different hostkey, the fingerprint has changed and clients can't or don't want to connect anymore.

This can be fixed by deleting the stored fingerprint.

Instructions for Putty, WinSCP and Linux are above.

If you use something else then google is your friend.

as a small hint, the linux instructions also apply to Macs

https://kinsta.com/knowledgebase/warning-remote-host-identification-has-changed/

[kernel-panic69]

https://dannyda.com/2020/08/17/how-to-delete-remove-permanently-added-ecdsa-key-fingerprint-from-windows-terminal-powershell-where-does-windows-terminal-powershell-save-ecdsa-key-fingerprint/

There's probably some command line voodoo that could be done to remove the old fingerprint or force the new one to be used, but.

[iMAK]