On Thu, 14 Aug 2008, Jan Engelhardt jengelh-at-medozas.de |netfilter| wrote:
CUPS does not actually use SNMP, does it? The way I have seen its output are regular UDP transmissions from and to port 631, without any replies (much like most NBT packets). -d 192.168.0.255 -p udp --dport 631
It does that too, but yes, recent (I'm not sure since when) cups also uses snmp. The port 631 transmissions are for finding other computers that share their printers. Snmp is used for finding standalone printers with their own ip addresses on your local network. See http://www.cups.org/documentation.php/network.html#SNMP
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