Issue Overview
When I connect to WD My Cloud SSH for setting up a backup tunnel for our file server. An error with “unable to connect to SSH with “no matching host key type found. Their offer: ssh-dss” error.” shows to me.
Error Message: ssh root@myserverip Unable to negotiate with myserverip port 22: no matching host key type found. Their offer: ssh-dss
Solution
This problem occurs by the version of OpenSSH included in 16.04 disables ssh-dss.
More information: http://www.openssh.com/legacy.html
To solve this problem you should add the option -oHostKeyAlgorithms=+ssh-dss to the SSH command.
ssh -oHostKeyAlgorithms=+ssh-dss root@myserverip
EXAMPLE: ssh -oHostKeyAlgorithms=+ssh-dss [email protected]
You can also add a host pattern in your ~/.ssh/config so you don’t have to specify the key algorithm every time.
Host myservername HostName myserverip HostKeyAlgorithms=+ssh-dss
EXAMPLE: Host bkkserver HostName 172.21.85.13 HostKeyAlgorithms=+ssh-dss
REF:
https://askubuntu.com/questions/836048/ssh-returns-no-matching-host-key-type-found-their-offer-ssh-dss
http://www.openssh.com/legacy.html