Printing with CUPS

Mitch Contla mcontla at
Mon Nov 6 16:26:15 UTC 2006

Alistair Crust said the following on 11/06/2006 07:41 AM:
> Hi,
> To fill you in I am from Skegness Grammar School an 800+ pupil school in
> Lincolnshire. We run Ubuntu Dapper as a thin client environment right
> throughout the school and use it to teach ALL curriculum lessons.
> Just recently we have had a few problems printing from the four LTSP
> servers we have. (we don't use edubuntu due to Local Disk Access,
> although in a few months we will be trying edgy on a test server. Anyway
> I digress). I think the reason is that we have the four app servers
> accessing the jetdirect enabled printers directly instead of on server
> managing all. We also would like to allow access to certain printers
> from all machines but only from staff accounts, thus:
> My idea was to install a Dapper server and on it cupsys et al. Then
> administer via web (from a set number of machines, e.i. My office, staff
> room, anywhere the kids don't have access). 
> Problem is that the web interface is disabled by default.. not a problem
> I hear you cry. Wrong! after enabling the / and /admin sections via the
> cupsd.conf Allow directive the web site does indeed become accessible,
> problem is that when trying to add a printer the web interface is asking
> for an upgrade because I am not accessing it from https://. I know this
> is some kind of licence issue using ssl, but I don't want to use https.
> and even when I install openssl the thing still doesn't work. I have
> googled and there has been a few posts relating to my problem here but
> none that actually fix the problem, after trying the suggestions the
> trail just goes cold.
> Any help would be greatly appreciated.
> Apologies for cross posting but I have had no luck so far and would
> really like the school to be shown as a good example to others. If I
> can't get printing to work then that kind of blows my efforts out the
> water.
Add the following line to /etc/cups/cupsd.conf, and restart cupsys:

DefaultEncryption IfRequested

I tested quickly, and this seems to work, however, I have not
investigated what side effects may occur. YMMV.


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