When using via the wrtg54 ssh connections timed out after a while.
Which is was mildly annoying. The problem that with mildly annoying things is they are mildly annoying.
So one does not go and fix them soon enough. In this case it was terribly easy to cure errors like:
Read from remote host 1.2.3.4: Connection reset by peer
Connection to 1.2.3.4 closed.
All that it needed was to create a file called .ssh/config in the home directory and add something like these lines:
ServerAliveInterval 60
ServerAliveCountMax 5000
Nice that it didn’t require any changes on the other end.