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[SOLVED] cups-browsed not finding any printers
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Mr. M
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PostPosted: Fri Oct 18, 2013 1:47 pm    Post subject: [SOLVED] cups-browsed not finding any printers Reply with quote

Hi,

I'm having some troubles with printing at work after upgrading to CUPS 1.6.X. After the update, none of the network printers were visible on my laptop, which was using the following /etc/cups.client.conf:

Code:

ServerName printsrv
Browsing On


Also, when I run "lpstat -a" I got a "Bad request" error. After some googling I found that this was caused by the IPP version which was changed in CUPS to use version 2.0 by default, which isn't supported by the print server. After changing the config file to

Code:

ServerName printsrv/version=1.1
Browsing On


lpstat shows the list of printers :). However, the printers are still not visible in CUPS. When running cups-browsed in the foreground there were some errors:

Code:

# cups-browsed --debug
cups-browsed: Reading config: BrowseRemoteProtocols DNSSD,CUPS
cups-browsed: network interface at XXX.XXX.XXX.XXX
cups-browsed: Using signal handler SIGACTION
cups-browsed: failed to bind CUPS Browsing socket: Address already in use
cups-browsed: listening
cups-browsed: Avahi Browser: NEW: service 'sccolor' of type '_ipp._tcp' in domain 'local'
cups-browsed: Avahi Browser: NEW: service 'hp LaserJet 4250 [E1D909]' of type '_ipp._tcp' in domain 'local'
cups-browsed: Avahi Browser: CACHE_EXHAUSTED
cups-browsed: Avahi Browser: ALL_FOR_NOW
cups-browsed: Avahi Browser: CACHE_EXHAUSTED
cups-browsed: Avahi Browser: ALL_FOR_NOW
cups-browsed: Avahi-Resolver: Failed to resolve service 'sccolor' of type '_ipp._tcp' in domain 'local': Timeout reached


I found a forum post that this was related to ipv6 (which I don't use), so I set "use-ipv6=no" in "/etc/avahi/avahi-daemon.conf". The error is gone. However, now cups-browsed doesn't detect any printers:

Code:

think martin # cups-browsed --debug
cups-browsed: Reading config: BrowseRemoteProtocols DNSSD,CUPS
cups-browsed: network interface at XXX.XXX.XXX.XXX
cups-browsed: Using signal handler SIGACTION
cups-browsed: listening
cups-browsed: Avahi Browser: CACHE_EXHAUSTED
cups-browsed: Avahi Browser: ALL_FOR_NOW
cups-browsed: Avahi Browser: CACHE_EXHAUSTED
cups-browsed: Avahi Browser: ALL_FOR_NOW


Any tips on how to proceed with trying to get printing to work again?


Last edited by Mr. M on Tue Oct 22, 2013 4:58 pm; edited 1 time in total
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eyoung100
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PostPosted: Fri Oct 18, 2013 3:27 pm    Post subject: Reply with quote

Are you using systemd :?:
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Mr. M
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PostPosted: Fri Oct 18, 2013 3:45 pm    Post subject: Reply with quote

eyoung100 wrote:
Are you using systemd :?:


No, I'm using openrc.
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eyoung100
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PostPosted: Fri Oct 18, 2013 3:56 pm    Post subject: Reply with quote

Code:
emerge ufed
ufed <--- Type ipv6, set to minus
emerge -uDN world


Remove IPv6 Support
Code:
Networking support --->
  Networking options --->
    < > The IPv6 protocol --->


Reboot
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Mr. M
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Joined: 18 Sep 2004
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PostPosted: Fri Oct 18, 2013 10:25 pm    Post subject: Reply with quote

eyoung100 wrote:
Code:
emerge ufed
ufed <--- Type ipv6, set to minus
emerge -uDN world


Remove IPv6 Support
Code:
Networking support --->
  Networking options --->
    < > The IPv6 protocol --->


Reboot


Thanks. I will update my system over the weekend and cross my fingers that I can print when I get back to the office on Monday :)
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Mr. M
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PostPosted: Tue Oct 22, 2013 4:57 pm    Post subject: Reply with quote

Turns out that ipv6 wasn't the culprit.. my firewall was blocking avahi. After adding

Code:

iptables -A INPUT -p udp -m udp --dport 5353 -j ACCEPT


to my firewall, the printers show up again :).
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eyoung100
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PostPosted: Tue Oct 22, 2013 5:02 pm    Post subject: Reply with quote

Mr. M wrote:
Turns out that ipv6 wasn't the culprit.. my firewall was blocking avahi. After adding

Code:

iptables -A INPUT -p udp -m udp --dport 5353 -j ACCEPT


to my firewall, the printers show up again :).


Great :!: :!:
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