What's on Port 22 on the Zero Hub

[#1]

Oy!  Leave my hat alone.  All right?  It matches my tin foil underpants.

[#2]

Ah ha 
I knew it!  How do you explain this thread where the Man offers to remotely 'upgrade' a customer's router?  It proves beyond doubt that Plusnet can access your network.
My tin foil is sparking...

[#3]

Don't accept or allow an upgrade to Plusnet v2 firmware, it will stop you from doing a http://192.168.1.254/dumpcfgdynamic.cmd
It's not port 22 that used for the upgrade anyway. If you download the text config with that command you'll find the port number if you look through.

[#4]

Thank you, Anotherone.

[#5]

If you get the ssh server enabled, it's that which is on port 22, but AFAIK it's only accessible from the LAN. At present I'm not having any luck with it, must have done something silly, have to look at it all again.