First, enable SSH access on the webinterface:
Admin pages -> Maintenance -> Secure Shell
Enter a random password, choose other settings as shown.
Click submit. At this stage, choosing to ssh [email protected] would lead to the following error message:
Unable to negotiate with 192.168.178.243 port 22: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1,diffie-hellman-group14-sha1,[email protected]
Therefore we have to use the following command:
ssh -oKexAlgorithms=+diffie-hellman-group1-sha1 [email protected]