Printing with CUPS

Alex Mandel tech_dev at
Mon Nov 6 18:00:01 UTC 2006

Mitch Contla wrote:
> 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.
If you can't get that to work here's a quick work around.
Add a port forward to your .shh/config and ssh into the box.
Then you can hit it as if you were on the other machine.
Host PrintServer
Hostname YourServerIP
   User Username4Connection
   LocalForward 6310 YourServerIP:631

Then when you ssh PrintServer, open your web browser to localhost:6310 
and you should be local to the remote machine.
I can't remember if the syntax is right or if I'm getting the ports 
mixed up so play around with it.

Here's a guide


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