[SOLVED] CUPS Web Interface

Message

NTICompass · Post by **NTICompass** » Sun Jul 26, 2009 12:21 am

I can access the CUPS web interface (http://localhost:631/) just fine, but I am having problems accessing the /admin or the /printers page.

'Add printer', and 'jobs' work fine. But, 'manage printers/server' and 'administration' don't. Firefox just says "Waiting for localhost".

What is wrong?

rsa4046 · Post by **rsa4046** » Sun Jul 26, 2009 10:54 am

Not sure which browser you are using, but at some point you should get a pop-up window

Code: Select all

Authentication Required
A username and password are being requested by http://localhost:631. The site says: "CUPS"

Does this not happen?

NTICompass · Post by **NTICompass** » Sun Jul 26, 2009 4:48 pm

rsa4046 wrote:Not sure which browser you are using, but at some point you should get a pop-up window
Code: Select all
Authentication Required
A username and password are being requested by http://localhost:631. The site says: "CUPS"
Does this not happen?

I'm using Firefox (3.0.11), and no that authorization window does not appear.

rsa4046 · Post by **rsa4046** » Sun Jul 26, 2009 6:15 pm

Can you check your /etc/cups/cupsd.conf file? Here is mine for comparison:

Code: Select all

#                          
# "$Id: cupsd.conf.in 7199 2008-01-08 00:16:30Z mike $"
#                                                      
#   Sample configuration file for the Common UNIX Printing System (CUPS)
#   scheduler.  See "man cupsd.conf" for a complete description of this 
#   file.                                                               
#                                                                       

# Log general information in error_log - change "info" to "debug" for
# troubleshooting...                                                 
LogLevel info                                                        

# Administrator user group...
SystemGroup lpadmin
                                                                                                                 
# Only listen for connections from the local machine.
Listen localhost:631
Listen /var/run/cups/cups.sock

# Show shared printers on the local network.
Browsing On
BrowseOrder allow,deny
BrowseAllow all   

# Default authentication type, when authentication is required...
DefaultAuthType Basic

# Restrict access to the server...
<Location />
  Order allow,deny
  deny From All
#Allow From 192.168.0.*
  Allow From 127.0.0.1
</Location>

# Restrict access to the admin pages...
<Location /admin>
  Encryption Required
  AuthType Basic
  AuthClass System
  Allow From 127.0.0.1
  Order allow,deny
  Deny From All
</Location>

# Restrict access to configuration files...
<Location /admin/conf>
  AuthType Default
  Require user @SYSTEM
  Order allow,deny
</Location>

# Set the default printer/job policies...
<Policy default>
  # Job-related operations must be done by the owner or an administrator...
  <Limit Send-Document Send-URI Hold-Job Release-Job Restart-Job Purge-Jobs Set-Job-Attributes Create-Job-Subscription Renew-Subscription Cancel-Subscription Get-Notifications Reprocess-Job Cancel-Current-Job Suspend-Current-Job Resume-Job CUPS-Move-Job>
    Require user @OWNER @SYSTEM
    Order deny,allow
  </Limit>

  # All administration operations require an administrator to authenticate...
  <Limit CUPS-Add-Modify-Printer CUPS-Delete-Printer CUPS-Add-Modify-Class CUPS-Delete-Class CUPS-Set-Default>
    AuthType Default
    Require user @SYSTEM
    Order deny,allow
  </Limit>

  # All printer operations require a printer operator to authenticate...
  <Limit Pause-Printer Resume-Printer Enable-Printer Disable-Printer Pause-Printer-After-Current-Job Hold-New-Jobs Release-Held-New-Jobs Deactivate-Printer Activate-Printer Restart-Printer Shutdown-Printer Startup-Printer Promote-Job Schedule-Job-After CUPS-Accept-Jobs CUPS-Reject-Jobs>
    AuthType Default
    Require user @SYSTEM
    Order deny,allow
  </Limit>

  # Only the owner or an administrator can cancel or authenticate a job...
  <Limit Cancel-Job CUPS-Authenticate-Job>
    Require user @OWNER @SYSTEM
    Order deny,allow
  </Limit>

  <Limit All>
    Order deny,allow
  </Limit>
</Policy>

#
# End of "$Id: cupsd.conf.in 7199 2008-01-08 00:16:30Z mike $".
#

If you make changes to yours, be sure to restart cupsd

Code: Select all

# /etc/init.d/cupsd restart

Edit: corrected file location

NTICompass · Post by **NTICompass** » Sun Jul 26, 2009 8:05 pm

I edited my cupsd.conf. Now it asks me for a password when I click on 'Administration'. Still doesn't load.

/printers /classes /admin nothing

Though I can get to the 'Add Printer' screen...

What else could be wrong?

My cupsd.conf looks like this:

Code: Select all

LogLevel info
HostNameLookups Double
SystemGroup lpadmin

# Only listen for connections from the local machine.
Listen localhost:631
Listen /var/run/cups/cups.sock

# Disable printer sharing and shared printers.
Browsing Off
DefaultAuthType Basic

# Restrict access to the server...
<Location />
  Order allow,deny
  deny From All
  Allow From 127.0.0.1
</Location> 

# Restrict access to the admin pages...
<Location /admin>
  Encryption Required
  AuthType Basic
  AuthClass System
  Allow From 127.0.0.1
  Order allow,deny
  Deny From All
</Location>

# Restrict access to configuration files...
<Location /admin/conf>
  AuthType Default
  Require user @SYSTEM
  Order allow,deny
</Location> 

<Policy default>
  <Limit Send-Document Send-URI Hold-Job Release-Job Restart-Job Purge-Jobs Set-Job-Attributes Create-Job-Subscription Renew-Subscription Cancel-Subscription Get-Notifications Reprocess-Job Cancel-Current-Job Suspend-Current-Job Resume-Job CUPS-Move-Job>
    Require user @OWNER @SYSTEM
    Order deny,allow
  </Limit>
  
  <Limit CUPS-Add-Modify-Printer CUPS-Delete-Printer CUPS-Add-Modify-Class CUPS-Delete-Class CUPS-Set-Default>
    AuthType Default
    Require user @SYSTEM
    Order deny,allow
  </Limit>
  
  <Limit Pause-Printer Resume-Printer Enable-Printer Disable-Printer Pause-Printer-After-Current-Job Hold-New-Jobs Release-Held-New-Jobs Deactivate-Printer Activate-Printer Restart-Printer Shutdown-Printer Startup-Printer Promote-Job Schedule-Job-After CUPS-Accept-Jobs CUPS-Reject-Jobs>
    AuthType Default
    Require user @SYSTEM
    Order deny,allow
  </Limit>
  
  <Limit Cancel-Job CUPS-Authenticate-Job>
    Require user @OWNER @SYSTEM
    Order deny,allow
  </Limit>
  
  <Limit All>
    Order deny,allow
  </Limit>
  
</Policy>

rsa4046 · Post by **rsa4046** » Mon Jul 27, 2009 8:57 am

NTICompass wrote:I edited my cupsd.conf. Now it asks me for a password when I click on 'Administration'. Still doesn't load.

/printers /classes /admin nothing

Though I can get to the 'Add Printer' screen...

What else could be wrong?

Hmmm, not sure. Are you a member of the lp group? As user, just type groups on a command line to see your group membership (if you need to add your user to a group, do, as root: gpasswd -a USER GROUP). I'm not sure why this should matter however, once authenticated as root at the web login. What version of cups are you running? What does 'emerge -vp cups' report?

rsa4046 · Post by **rsa4046** » Mon Jul 27, 2009 9:06 am

Also (sorry for the double post): Does

Code: Select all

# tail /var/log/cups/page_log

record your login? What about

Code: Select all

# tail /var/log/cups/access_log

NTICompass · Post by **NTICompass** » Mon Jul 27, 2009 7:03 pm

I am not in the lp group.

tail /var/log/cups/access_log

Code: Select all

localhost - - [27/Jul/2009:14:51:13 -0400] "GET /images/bottom-right.gif HTTP/1.1" 200 123 - -
localhost - - [27/Jul/2009:14:51:13 -0400] "GET /images/tab-left.gif HTTP/1.1" 200 46 - -
localhost - - [27/Jul/2009:14:51:13 -0400] "GET /images/button-manage-printers.gif HTTP/1.1" 200 508 - -
localhost - - [27/Jul/2009:14:51:13 -0400] "GET /images/happy.gif HTTP/1.1" 200 3522 - -
localhost - - [27/Jul/2009:14:51:13 -0400] "GET /images/button-manage-server.gif HTTP/1.1" 200 493 - -
localhost - - [27/Jul/2009:14:51:14 -0400] "GET /printers/ HTTP/1.1" 200 0 - -
localhost - - [27/Jul/2009:14:51:17 -0400] "GET /admin/ HTTP/1.1" 401 0 - -
localhost - root [27/Jul/2009:14:51:22 -0400] "GET /admin/ HTTP/1.1" 200 0 - -
localhost - root [27/Jul/2009:14:57:59 -0400] "GET /admin/ HTTP/1.1" 200 0 - -
localhost - - [27/Jul/2009:14:58:01 -0400] "GET /printers/ HTTP/1.1" 200 0 - -

NTICompass · Post by **NTICompass** » Wed Jul 29, 2009 12:56 am

tail /var/log/cups/error_log

Code: Select all

W [28/Jul/2009:20:55:37 -0400] IP lookup failed - connection from localhost closed!
W [28/Jul/2009:20:55:37 -0400] IP lookup failed - connection from localhost closed!
W [28/Jul/2009:20:55:37 -0400] IP lookup failed - connection from localhost closed!
W [28/Jul/2009:20:55:37 -0400] IP lookup failed - connection from localhost closed!
W [28/Jul/2009:20:55:37 -0400] IP lookup failed - connection from localhost closed!
W [28/Jul/2009:20:55:37 -0400] IP lookup failed - connection from localhost closed!
W [28/Jul/2009:20:55:37 -0400] IP lookup failed - connection from localhost closed!
W [28/Jul/2009:20:55:37 -0400] IP lookup failed - connection from localhost closed!
E [28/Jul/2009:20:55:37 -0400] PID 26518 (/usr/libexec/cups/cgi-bin/admin.cgi) crashed on signal 9!
I [28/Jul/2009:20:55:37 -0400] Hint: Try setting the LogLevel to "debug" to find out more.

NTICompass · Post by **NTICompass** » Wed Jul 29, 2009 1:01 am

FIXED IT!

removed Listen /var/run/cups/cups.sock from confd.conf
and removed ServerName /var/run/cups/cups.sock from client.conf