[cups.general] Upgrade to 1.6.2 breaks DNS-SD print server setup

[Helge Blischke]

Dennis Leeuw wrote:

> Hi all,
> 
> We have the following setup:
> 
> A CUPS 1.4.3 print server running on Ubuntu server in a server network.
> A couple of Mac OS X (and Windows and Linux) clients in different
> networks around the organisation and they all need to access the same
> print server. To make Bonjour printing work we added DNS-SD entries to
> our DNS server. This worked fine until the upgrade to Mac OS X 10.8.3.
> 
> The DNS-SD setup to support the printers looks like this:
> b._dns-sd._udp.domain.nl domain name pointer domain.nl.
> lb._dns-sd._udp.domain.nl domain name pointer domain.nl.
> 
> _ipp._tcp.op.domain.nl domain name pointer printer01._ipp._tcp.domain.nl.
> _universal._sub._ipp._tcp.domain.nl domain name pointer
> printer01._ipp._tcp.op.domain.nl.
> _cups._sub._ipp._tcp.domain.nl domain name pointer
> printer01._ipp._tcp.domain.nl.
> 
> printer01._ipp._tcp.domain.nl descriptive text "txtvers=1" "qtotal=1"
> "rp=printers/printer01"
> "adminurl=ipp://ipp.domain.nl.:631/printers/printer01" "product=(hp
> LaserJet 4350)" "ty=HP LaserJet 4350" "note=room 120" "Priority=50"
> "pdl=application/postscript" "Transparent=F" "Binary=F" "TBCP=F"
> "URF=none"
> 
> printer01._ipp._tcp.domain.nl has SRV record 0 0 613 ipp.domain.nl.
> printer01._ipp._tcp.domain.nl has address 123.123.123.123
> ipp.domain.nl has address 456.456.456.456
> 
> With Mac OS X up till 10.8.2 (CUPS 1.6.1) all worked fine. Users could
> select the printer via the printing panel, the PPD file got fetched from
> the CUPS servers and everybody was (more or less) happy.
> With the upgrade to Mac OS X 10.8.3 and CUPS 1.6.2 this seems to be
> broken some how. In the printing panel the printer can be selected and
> installed, but when the user tries to print  the print-job-dialog says:
> "Printing - The printer is not responding"
> 
> Looking at the settings on localhost:631 web interface the Defaults say
> media=na_letter_8.5x11in instead of media=iso_a4_210x297mm which should
> be the default from the PPD on the print server.
> The printing-panel in the pre-10.6.2 situation says at Kind the name
> from the PPD, where in the 10.6.2 situation it reports "Generic
> PostScript Printer"
> tcpdump on the print server records a SYN packet from the client and an
> RST
> 
> So it seems that the new cups is not getting the PPD and can, somehow,
> not connect to the print server. What I also noticed is a lot of SNMP
> connections from the Mac OS X clients to the print server (but these are
> blocked in the print server firewall).
> 
> A telnet from the client to port 631 works.
> 
> Running:
> dns-sd -B _ipp._tcp .
> on the client shows:
> date_string Add 3 0 domain.nl _ipp._tcp printer01
> 
> I am probably overlooking something, but what? Can someone point me in
> the right direction?
> 
> Thanks,
> 
> Dennis Leeuw

Look at 
http://www.cups.org/newsgroups.php?s9067+gcups.bugs+v9074+T1

To fix it on your Mac OS X >= 10.6.2 clients you need to recompile cups 
1.6.2 from the sources and replace cupsd. But make sure you saved the 
original cupsd in advance (just in case ...).

Helge