One should also see, if the services are listening for outside connections or
only local ones. I use the ss -lt command for that. As I remember, Trisquel
7 doesn't listen for anything from outside by default. The output of ss
should look like this:
Local Address:Port
127.0.0.1:ipp
127.0.0.1:9050
127.0.1.1:domain
::1:ipp
Addresses like 127.0.0.1, 127.0.1.1 and ::1 are local addresses. Other
computers can't connect to your computer using these address:ports.
With sudo ss -ltp you can see which processes are listening on each port, if
you want to stop them. For example, 127.0.0.1:ipp is cups.
