CUPS Host Error

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In versions of CUPS from 2009 onwards for both Linux and Mac OS X, administrators may encounter issues where jobs sent from a network workstation to the print server will halt and generate errors in the CUPS print logs. This is not a problem caused by PaperCut and will happen even without PaperCut installed. Based on research at the time of writing, it is a currently tracked bug within a number of Linux communities.

The key error notification will appear in the CUPS print log, similar to the example below:

  [15/Dec/2011:17:44:12 −0500] Request from “” using invalid
  Host: field “”


The most common way to resolve this issue is as follows:

  1. Add ServerAlias * in a new line to your cupsd.conf file.
    1. For Linux this should be located here: /etc/cups/cupsd.conf
    2. For OS X this should be located here: /private/etc/cups/cupsd.conf
  2. If you are using IPP to share the printers, try connecting with LPR.

Categories: Printers, Troubleshooting

Keywords: queue, stuck job


Share your findings and experience with other PaperCut users. Feel free to add comments and suggestions about this Knowledge Base article. Please don't use this for support requests.

Article last modified on December 20, 2011, at 02:43 AM
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