Is this problem solvable?

[Timothy Murphy]

Before leaving home on a visit to Italy (where I am now)
I re-booted my server.
I noticed that shorewall did not print out its usual messages,
but foolishly did not check what caused this.
Now I can ping the machine,
but cannot ssh into it (I chose a strange port)
or access its web-server.

My question is: given that I can ping the machine,
is there any way I can re-boot it remotely,
or even just re-start shorewall?