On 10/31/2014 02:34 AM, Jarmo Hurri wrote:
I tried disabling cups services, but then printing stopped working.


What else do you expect when you disable the printing service?

So ok, I need a connection from my computer to port 631 for
printing. But that port should be closed from all other computers. At
the moment it is open to the outside world (10.13.3.247 is the address
of my computer in LAN):

If you want to make sure nobody outside your LAN has access to your printer, shut the port on your router.
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