Description of problem: My print server is set up to announce and share printers to the local network - «Share printers connected to this system» is ticked in the Web UI, and cupsd.conf contains the following: Browsing On BrowseOrder allow,deny BrowseAllow all BrowseRemoteProtocols CUPS BrowseAddress @LOCAL BrowseLocalProtocols CUPS dnssd However, clients only discover the remote printers if they have IPv4 addresses (the server has both IPv6 and IPv4). If a client only has IPv6, then the remote printer queue doesn't show up automatically. Version-Release number of selected component (if applicable): F13, cups-1.4.4-5.fc13.x86_64 (on both server and client) How reproducible: 100% Steps to Reproduce: 1. Connect a IPv6-only client to a network with a CUPS print server on it 2. Attempt to print something Actual results: No (remote) printers have been made available to the local CUPS server on the client, and you cannot print anywhere. Expected results: The remote print queues should have been discovered the same way they are if the client also had an IPv4 address. Additional info: I can work around it for now by manually adding the print server under "advanced settings" in system-config-printer, then I can print over IPv6 just fine. It's just the automatic remote queue discovery that fails. When I tcpdump ipp traffic on the client I see that the periodic announcements made by the server are only done over IPv4: $ sudo tcpdump -i eth0 -c 5 port ipp tcpdump: WARNING: eth0: no IPv4 address assigned tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes 11:48:54.138602 IP 10.0.0.2.ipp > 10.0.0.255.ipp: UDP, length 174 11:49:25.137751 IP 10.0.0.2.ipp > 10.0.0.255.ipp: UDP, length 174 11:49:56.169618 IP 10.0.0.2.ipp > 10.0.0.255.ipp: UDP, length 174 11:50:27.169026 IP 10.0.0.2.ipp > 10.0.0.255.ipp: UDP, length 174 11:50:58.172276 IP 10.0.0.2.ipp > 10.0.0.255.ipp: UDP, length 174 5 packets captured 5 packets received by filter 0 packets dropped by kernel
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# netstat -tunap|grep cups tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN 18917/cupsd tcp 0 0 ::1:631 :::* LISTEN 18917/cupsd udp 0 0 0.0.0.0:631 0.0.0.0:* 18917/cupsd IMO it needs to bind the v6 udp for broadcasts. It would be Listen setting in /etc/cupsd.conf file (and for .default also which gets used with cupsctl).
Please attach the /etc/cups/cupsd.conf you're using.
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