Once upon a time, Tim Waugh <twaugh@xxxxxxxxxx> said: > When I ask CUPS for a list of network printers, it runs the backends > in /usr/lib/cups/backend. One of those is /usr/lib/cups/backend/snmp, > which: > > a) binds to a local unprivileged UDP port > b) sends a broadcast SNMP request > c) listens for (unicast) responses to that request > > We don't hear any of those responses because they are not recognised as > "related" by the kernel. The iptables rules drop them. > > If the CUPS snmp backend could say to "the firewall", "hey, please allow > responses on this port I've got for the next few seconds" -- which can > be controlled using PolicyKit -- then this network discovery would > finally work. Congrats, you have re-invented UPnP, although a local-only version maybe (not that I think that is necessarily a bad thing). -- Chris Adams <cmadams@xxxxxxxxxx> Systems and Network Administrator - HiWAAY Internet Services I don't speak for anybody but myself - that's enough trouble. -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel
