Comment 2 for bug 1769284

No, this is not an option. Also note, that this breaks a lot of workflows without reason, because Ubuntu ssh client simply stops working with a message like "~/.ssh/config line 3: Bad SSH2 cipher spec '...'": it simply does not know such ciphers (does not ignore them). So especially in environments with shared homes bionic (the usual case in enterprises?) cannot be deployed (and telling people, that they need to use different options when the are on bionic, is simply is useless pain for the users as well as company hotlines).

Ubuntu should do, what all major enterprise ready distributions/unices do, i.e. bundle support for those ciphers for backward compatibility, but disable them per default).