CUPS: 426 - Upgrade Required
13 Nov, 2006
1 minute read

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.

Continue reading...

Want to keep reading and learn more? I've got you
covered with a hand picked selection of awesome books.

See Ariejan's book recommendations »