Hello John, Am Donnerstag, den 23.03.2006, 20:36 +0800 schrieb John Summerfield: > In a similar vein, cups servers can communicate with each other by UDP > broadcasts to port 631. It's how my laptop automatically discovers > printers at home, and different printers at work. If you're printing on > a network, you probably want it open. This is true. > TCP port 631 is different, and unless something's changed recently, > there's nothing listening to any external interface on port 631. If you allow your printer to be used by other machines, they will make the connection to the printer via tcp:631 to your machine. It is just needed, if you want your machine to be configured remotely via e.g. web browser or to be print server. Regards, Ingo
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