I was about to file this same bug. After a few days of research, I found the following similar or related bug reports:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=525910 https://bugs.launchpad.net/ubuntu/+source/cups/+bug/763755 https://answers.launchpad.net/ubuntu/+source/cupsys/+question/7880 http://thismightbehelpful.blogspot.ca/2008/09/remote-access-to-cups-web-interface.html Note, the issue begins in 1.4.x versions of cups, <=1.3 should work fine, so a downgrade might be your desired course of action if that's a possibility for you. None of the solutions provided in those helped. In case you find this via google, let me save you some time and enumerate them here: -In cups.conf, add (or uncomment, or modify) a line at the end to read: ServerAlias * -In cups.conf, add (or uncomment, or modify) the entry for "<Location /admin>" to: Allow from all or Allow from [some ip here] -In cups.conf, add a line that reads: Listen 192.168.1.1:631 or Listen *:631 (or whatever port you want to use instead of 631) (with the IP you want to allow access to) The problem shows up as lines similar to the following in your cups error_log file: E [23/Nov/2015:15:35:28 -0500] Request from "localhost" using invalid Host: field "cups_local_host:631" The most relevant link was: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=530027 which traces the problem to this patch: https://bugzilla.redhat.com/attachment.cgi?id=335489 (direct link to msg: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=530027#56 ) Which was submitted to solve: https://security-tracker.debian.org/tracker/CVE-2009-0164 So with that info, I downloaded the sources on my fedora (fc17) machine, modified them, rebuilt the packages and installed, and everything works now as (I) intended. I have attached the patch I wrote which solves it for me, WARNING: this might introduce some security issues (related to CVE-2009-0164), which I didn't delve too deeply to know whether they do or not. So, USE AT YOUR OWN RISK. Read this too: http://www.cups.org/str.php?L3183 When running the patched version, you still need to have the proper Listen and ServerAlias entries, of course. ** Bug watch added: Debian Bug tracker #525910 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=525910 ** Bug watch added: Debian Bug tracker #530027 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=530027 ** CVE added: http://www.cve.mitre.org/cgi- bin/cvename.cgi?name=2009-0164 ** Patch added: "cups-patch-for-bad-request.diff" https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1086303/+attachment/4524379/+files/cups-patch-for-bad-request.diff -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to cups in Ubuntu. https://bugs.launchpad.net/bugs/1086303 Title: Cups server can't listen - accept connections to 127.0.1.1 ( Bad request ) Status in cups package in Ubuntu: New Bug description: As we know ubuntu binds the following 127.0.0.1 localhost 127.0.1.1 hostname We assume that my hostname is afterburner Cups listens by default to localhost - 127.0.0.1 so if you try to access it using your hostname it fails so i proceed as follows In the cupsd.conf If i comment out the " port 631 " and add Listen afterburner:631 im getting bad request when trying to open http://afterburner:631 The same is happening with the Listen 127.0.1.1:631 All this happening when trying to access cups webpage form the pc that running the cups , if you try to access the cups server form a lan pc using the http://afterburner:631 it works even with the default config. So my question is why using all the different configurations im not able to access cups webpages from the same pc using the hostname ? http://afterburner:631 I can only access cups from the same pc using http://127.0.0.1:631 http://localhost:631 when using the default cupsd.conf that listens to "port 631" ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: cups 1.6.1-0ubuntu11 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 NonfreeKernelModules: fglrx ApportVersion: 2.6.1-0ubuntu7 Architecture: amd64 Date: Tue Dec 4 11:19:58 2012 InstallationDate: Installed on 2012-11-14 (19 days ago) InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5) Lpstat: Error: command ['lpstat', '-v'] failed with exit code 1: lpstat: No destinations added. MachineType: System manufacturer System Product Name MarkForUpload: True Papersize: letter ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=c8a96c42-10b2-4661-9472-a89ba6ef74cb ro quiet splash vt.handoff=7 SourcePackage: cups UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/30/2008 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 1601 dmi.board.asset.tag: To Be Filled By O.E.M. dmi.board.name: Blitz Formula dmi.board.vendor: ASUSTeK Computer INC. dmi.board.version: Rev 1.xx dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1601:bd12/30/2008:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnBlitzFormula:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.name: System Product Name dmi.product.version: System Version dmi.sys.vendor: System manufacturer mtime.conffile..etc.cups.cupsd.conf: 2012-12-04T11:20:29.252332 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1086303/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
