* On 2025 13 Apr 10:38 -0500, Stefan Monnier wrote: > >> My laptop has one to two handful of these, depending on what I'm > >> currently playing with. > > I taking a class at the local library; my laptop has avahi and cups > > ports open .. which I'm not thrilled about but I like the zero-conf > > printing ability. > > Why do you need cups ports open to print? > I understand you need the cups port to be open on the side of the > printer (or print-server), but not on the side of the machine that sends > the print job. > Am I missing something?
No. On my systems CUPS only listens on localhost:631. The firewall blocks outside access for good measure. For avahi, it is listening on 0.0.0.0 and localhost. Firewalling should be fine for discovering other devices and blocking discovery of the firewalled device, though I am far from an expert. - Nate -- "The optimist proclaims that we live in the best of all possible worlds. The pessimist fears this is true." Web: https://www.n0nb.us Projects: https://github.com/N0NB GPG fingerprint: 82D6 4F6B 0E67 CD41 F689 BBA6 FB2C 5130 D55A 8819
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