Greetings,I started asking about this recently from a slightly different point of view.
My desktop computer is not always easily accessible. I often access it from my laptop through dyndns.org.
I can ping my desktop from my laptop with its dyndns.org address. The address is maintained by ddclient.
From several months ago ssh to that same address times out. (This worked for years before that.)
I don't know how to diagnose this. TIA for any help, Paul