[arch-general] Cups 1.6 printer discovery

mike cloaked mike.cloaked at gmail.com
Mon Jul 30 16:50:36 EDT 2012

On Mon, Jul 30, 2012 at 9:48 PM, mike cloaked <mike.cloaked at gmail.com> wrote:
> On Mon, Jul 30, 2012 at 9:02 PM, Mantas Mikulėnas <grawity at gmail.com> wrote:
>> On Mon, Jul 30, 2012 at 10:52 PM, mike cloaked <mike.cloaked at gmail.com> wrote:
>>> In fact I already had "BrowseLocalProtocols dnssd" in cupsd.conf in my
>>> laptop (client) - and on checking the server machine in fact
>>> avahi-daemon was already running - though I may need to change a
>>> config somewhere to allow it to broadcast dns-sd?
>> Can your laptop see the server machine itself?
>> Use `avahi-discover`, `avahi-browse --all`, or `mdns-scan`. (With
>> nss-mdns installed, the server can also be accessed via
>> `<hostname>.local`)
>>> I now have avahi-daemon running in the client laptop also but I don't
>>> see any printers visible from the server in the local network - one
>>> question I don't know is what port the dns-sd traffic needs - I need
>>> to ensure that any required port is not blocked in the firewalls.
>> mDNS uses port 5353/udp and also relies on IP multicast (which is core
>> part of IPv6, but sometimes breaks in IPv4).
> OK I have avahi-daemon running on both client and server - and have
> just opened up port 5353 on both machines (mdns)
> avahi-browse --all now sees the printer and opening a browser on
> localhost:631 and asking to find new printers now sees the cups shared
> printer and I can now complete a set of menu options and it has set it
> up nicely.  Now the printer is seen on print options - so this is a
> great success.
> I think the main key item was opening port 5353 on the firewall....
> Thank you for your help.

I did not need to change any of the config in nsswitch.conf and so
Mantas was perfectly correct.

Mantas - thank you very much for your advice this evening.

mike c

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