Hi Colin, thanks a lot for the quick answer!
> > When starting SSH connections, I get a warning: > > > > ~/.ssh/config line 152: Unsupported option "compressionlevel" > > > > But the man page "ssh_config" clearly states this option, > > It says "Note that this option applies to protocol version 1 only", so > to enable this option you'd need to install openssh-client-ssh1 and to > use the "ssh1" binary. Protocol 2 compression doesn't support different > compression levels. > > (Are you sure that you still need this, though? You should be using > protocol 2 unless you have absolutely no choice. Maybe this is just a > leftover in your configuration file.) Yeah, looks like it. I wouldn't (knowingly) use protocol 1 since 2001, or something in that range. Well, at least on the Linux machines - not sure about the various switches out there... Thank you!

