No ssh via webgui

[Ednax]

Hello I get the following error in webqui

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: THE IDENTIFICATION OF THE REMOTE HOST HAS CHANGED! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING BAD!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.
The fingerprint for the ECDSA key sent from the remote host is
SHA256:kn2h3GOS8AQimPXs/9rDaiKqTDOnXXXXXXXXXXX.
Please contact your system administrator.
Add the correct host key in /root/.ssh/known_hosts to get rid of this message.
Incorrect RSA key in /etc/ssh/ssh_known_hosts:9
remove with:
ssh-keygen -f "/etc/ssh/ssh_known_hosts" -R ""
The ECDSA host key for has changed and you have requested a strict check.
The host key verification has failed.

I do not get this error via Putty.


pvecm updatecerts -f , ssh-keygen -f "/etc/ssh/ssh_known_hosts" -R "" and ssh-keygen -R XXX.XXX.XXX.XXX / do not bring any solution



My 3 other nodes work fine in Webqui , but can not connect to my 4th node with ssh.

EDIT :
i can't reach the lxc container via ssh of the gui either, the VM works

 

[bbgeek17]

Login to your affected node via putty:
cp /etc/ssh/ssh_known_hosts /etc/ssh/ssh_known_hosts.old
sed -i '9d' /etc/ssh/ssh_known_hosts

and see if it helps

---

Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox

 

[Ednax]

Login to your affected node via putty:
cp /etc/ssh/ssh_known_hosts /etc/ssh/ssh_known_hosts.old
sed -i '9d' /etc/ssh/ssh_known_hosts

and see if it helps

---

Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox

unfortunately did not bring a solution .

Instead now comes the following error: Connection error 596: tls_process_server_certificate: certificate verify failed

EDIT :
The error : Connection error 596: tls_process_server_certificate: certificate verify failed is now gone after a reboot, but the old problem persists

 

[bbgeek17]

You can roll back
cp /etc/ssh/ssh_known_hosts.old /etc/ssh/ssh_known_hosts

If you login to GUI on node1 and then try to open console of node4 - the ssh connection is essentially from 1 to 4. Its the same as you would have done it from putty while logged into node1 and open ssh to node4.
So the easiest way to test is from normal console. I dont know how you broke, but you might as well setup clean key on all nodes. Some info here: https://forum.proxmox.com/threads/setup-ssh-keys.93134/ and of course generic google search "setup linux ssh keys".
Make sure you can ssh from each node to every other node and you should be ok.

---

Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox