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CUPS: 426 – Upgrade Required

As I was installing my printer on my Ubuntu 6.06 Dapper LTS server with CUPS I noticed the following error:

426 Upgrade Required

After some research I came to the conclusion that CUPS, by default, tries to use SSL whenever possible. So, with this 426 error, you are redirected to the SSL domain. Chances are, you haven’t configured SSL properly, if at all.

In my case, I didn’t want to configure SSL. To get rid of this problem, the key lies in editing your configuration files ( /etc/cups/cupsd.conf ) and adding the following line:

DefaultEncryption Never

There are several options, Never, IfRequired and Required. By setting this to Never, SSL will never be enforced. Just restart your CUPS server with

$ /etc/init.d/cupsys restart

and you’re good to go.

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This entry was posted on Monday, November 13th, 2006 at 16:21 and is filed under Features, General. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

12 Responses to “CUPS: 426 – Upgrade Required”

  1. Oscar says:
    23 January, 2007 at 13:11

    hi,
    you’ve got a little mistake, the configuration file to edit is /etc/init.d/cupsd.conf, not /etc/init.d/cupd.conf.

    thanks for the trick!

  2. Ariejan says:
    23 January, 2007 at 13:21

    @Oscar: Thanks. I’ve updated the post.

  3. CUPS :426 Upgrade Required « Just [invaleed] says:
    3 July, 2007 at 00:51

    [...] ternyata Tuhan masih bersamaku, sekali buka google, kemudian paste error diatas, langsung nemu link [1] yang sesuai dengan problem yang sedang [...]

  4. lex luthor says:
    24 October, 2007 at 15:20

    Great…Thanks.

  5. asmith says:
    25 October, 2007 at 22:14

    hi,
    you’ve got a little mistake, the configuration file to edit is /etc/init.d/cupsd.conf, not /etc/init.d/cupd.conf.
    thanks for the trick!

    as a matter of fact, the conf file of Cups it’s located at /etc/cups/cupsd.conf

    good information though.

  6. sequethin says:
    13 November, 2007 at 21:55

    THANK YOU! this was driving me nuts while trying to configure cups on my zaurus (running openbsd where the config file requires encryption by default).

  7. Alex J says:
    10 December, 2007 at 23:53

    Thanks for the fix. I did not know what to do. :-)
    This just proves that it IS important to post seemingly trivial bits of information on the net.

  8. Norio says:
    15 May, 2008 at 12:37

    Great info! Helped me big time! Thanks :)

  9. Krzysztof says:
    15 June, 2008 at 00:23

    Thanks a lot! This did the trick, and my printer is now served over the network by CUPS! :) Yikes!

  10. dani3L says:
    26 June, 2009 at 12:31

    Hi man! Thanks a lot! :) That’s works!

  11. John Pfeiffer Linux says:
    11 September, 2009 at 13:45

    Great tip!

    I’ve incorporated it into my linux tutorials

    Note that in my /etc/cups/cupsd.conf the parameter is:

    DefaultEncryption Never
    DefaultEncryption IfRequested
    DefaultEncryption Required

  12. Michael Scheepers says:
    23 November, 2009 at 13:40

    Thanks dude!

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