I found the issue.
In /etc/cups/cups.d/ports.conf:
Port 631
works, but
Listen /var/run/cups/cups.sock
Listen localhost:631
Listen liet.home.whinlatter.ukfsn.org:631
does not. Even though the documentation says that Port is equivalent
to Listen, Listen does not permit browsing.
When using Port:
$ sudo lsof |grep UDP
dhclient 3319 root 5u IPv4 8869 UDP *:bootpc
cupsd 3920 root 3u IPv4 10479 UDP *:ipp
$ netstat --udp --all
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
udp 0 0 *:bootpc *:*
udp 0 0 *:ipp *:*
When using Listen:
$ sudo lsof |grep UDP
dhclient 3319 root 5u IPv4 8869 UDP *:bootpc
cupsd 4056 root 4u IPv4 11482 UDP *:ipp
$ netstat --udp --all
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
udp 0 0 *:bootpc *:*
udp 0 0 *:ipp *:*
The former is sending browsing information, but the latter is not. I
can't see any difference between the two here, so is this a CUPS bug?
Regards,
Roger
--
Roger Leigh
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