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Dragonlord
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Joined: 22 Aug 2004
Posts: 446
Location: Switzerland
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 Posted: Sat Apr 18, 2009 6:22 pm Post subject: cups-1.3.10 totally breaks printing |
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Upgrade to cups-1.3.10 and hell breaks loose. Nobody in the office can print anymore: all dead. Checked the logs and the following keeps piling:
[code]Request from "XXX.XXX.XXX.XXX" using invalid Host: field "server.xxx.xxx:631"[/quote]
Google gave no information. I found somewhere a reference that a slew of bugs got fixed in 1.3.10 including security flaws. Looks like they also introduced a heck lot of bugs in the same time. What the hell is going on here? No printing, no website at 631. What's that please for a bug-fix! Any ideas? |
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kevstar31
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Joined: 22 Nov 2006
Posts: 449
Location: Ohio
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| Posted: Sat Apr 18, 2009 8:20 pm Post subject: |
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what is the output of:
| Code: | | cat /var/log/cups/access_log && cat /var/log/cups/error_log && cat /var/log/cups/page_log |
at http://pastebin.com/ and post a link to it.
God Bless,
Kevin
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Dragonlord
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Location: Switzerland
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| Posted: Sat Apr 18, 2009 10:20 pm Post subject: |
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Exactly what I mentioned above, tons and tons of this line. The server just disallows anything which is not localhost:631 .
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kernelOfTruth
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Location: Vienna, Austria; Germany; hello world :)
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Dragonlord
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Joined: 22 Aug 2004
Posts: 446
Location: Switzerland
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| Posted: Sun Apr 19, 2009 1:28 am Post subject: |
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Figured it out. Looks like the CUPS upstream guys are total morons. They change the behavior of the CUPS server in a way it's no fucking server anymore. All requests, no matter if printing or web interface are denied if the client does not identify itself in the header as localhost which literally turns a network application into a fucking brick. There's only one localhost in the entire universe and that the server itself. Everybody else has a hostname different from localhost. So denying anything but localhost totally kills the server. Whoever had this great idea should be banned from ever writing software again. Solution is to add a "ServerAlias *" which is labeled in the docs as highly insecure. Well... if I can choose between a server which is no server ( because it server nobody but localhost ) and this option then what the hell of a different choice one has. Upstream morons please fix your idiocy ASAP. This is not a bug this is a software engineering crime of the highest degree! ¬.=.¬
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overkll
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Joined: 21 Sep 2004
Posts: 1249
Location: Austin, Texas
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| Posted: Sun Apr 19, 2009 2:26 am Post subject: |
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If you change "Listen localhost:631" to "Port 631", it's back in server mode.
I found a different bug. If one uses the CUPS gui via a web browser, and enable "Show printers shared by other systems" and/or "Allow remote administration", the gui edits /etc/cups/cupsd.conf with the wrong syntax for "Allow". The gui uses "Allow @LOCAL", when the correct syntax is "Allow from @LOCAL"
It took some time, hair pulling and head banging to figure it out. |
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kernelOfTruth
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