Re: [Solved - of sorts] CUPS printing problems

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Jeff Vian <[email protected]> wrote:

On Thu, 2006-04-20 at 08:17 -0500, Jeff Vian wrote:

On Thu, 2006-04-20 at 08:03 +0100, Paul Howarth wrote:
> On Wed, 2006-04-19 at 20:52 -0500, Jeff Vian wrote:
> > I have recently added an FC5 system to my home network.
> > I already have an FC4 server that has all my printers connected and I
> > want to not have to move them.  I want to have all machines on my local
> > LAN able to print to this server.
> > Note: I am not running samba since I have no windows systems to deal
> > with.
> > > > Printing from the local machine works, so it seems this is related to > > enabling > > > > I have gone to the CUPS documentation and it seems that I should be able
> > to add a simple "Listen IP:port" in the cupsd.conf file and it should
> > work.
> > Whenever I try adding this option in the conf file then restarting cups
> > it fails with "child exited with error 98!", as if the syntax was wrong.
> > I cannot see the error, and what I have is like the example given in
> > the .conf file but it just fails.
> > > > Without the Listen option, the access_log shows me that the printing
> > attempt from the remote system fails with a 403 error.
> > > > Any pointers to the obviously simple fix for my blind eyes?
> > Make sure there's no uncommented "Port" option in the file. > > What I have on my printer server is: > > Browsing On
> BrowseProtocols cups
> BrowseOrder Deny,Allow
> BrowseAllow from @LOCAL
> BrowseAddress 255.255.255.255
> Listen *:631
> > The other linux boxes on my network auto-discover my printer with this
> config on the server.
> > Paul. >
I see this at the end of my cupsd.conf file

<Location /printers/stylus-photo-r300--1>
Order Deny,Allow
Deny From All
Allow From 127.0.0.1
AuthType None
</Location>
In each of the location stanzas of the type above I added another
"Allow From x.x.x.x" line with the IP of the remote workstation.
Now when I restarted cupsd I can print from the remote workstation.

This is at best a work-around and I need to find out why it cannot be
configured this way using the cups interface (or file a bug because it
cannot).

Browsing On
BrowseProtocols cups
BrowseOrder Deny,Allow
BrowseAllow from @LOCAL
BrowseAddress 255.255.255.255
Listen *:631

Similar <Location> stanzas for *some* of the printers I have defined,
but not all.
It seems it has all the lines you suggested Paul, but the location
blocks likely prevent the connection.

My questions now become this:
1. Why does it only show some of the defined printers?
All were defined using the cups interface. The ones listed in cupsd.conf
and those not listed there all work from the local print server.

2. This area is clearly marked with a line that says # Lines below are automatically generated - DO NOT EDIT
What happens if I do edit that part of the file, then maybe change or
add printers after editing it?


I would think that the use of the cups interface to define printers
would be standard, but it was not.  I also cannot find in any of
the /admin pages a way to turn on sharing so it seems this would have to
be edited in order to enable sharing.

I guess the admin of cups is a bit obscure on how to do things other
than printing on the localhost.

I will try a couple of other things and see what the result is.

Thanks for the pointers.

Jeff

The following was generated using the cups configuration tool. It allows printing from any system on my local network (192.168.0.0/16) as well as the print server. I'm guessing you would need to find somebody who really understands CUPS to explain the need for the multiple layers (/printers/SamsungML-1210, /printers/Samsung, /, /printers/lp0) but it works. The only manual configuration required was to diddle with /etc/cups/mime.convs and /etc/cups/mime.types so that Windoze boxes on the network can print.
...
[Boilerplate cups.conf file]
...
#
# End of "$Id: cupsd.conf.in,v 1.8 2002/12/13 16:23:54 mike Exp $".
#
<Location /printers/SamsungML-1210>
Order Deny,Allow
Deny From All
Allow From 192.168.0.0/16
AuthType None
</Location>
<Location /printers/Samsung>
Order Deny,Allow
Deny From All
Allow From 192.168.0.0/16
AuthType None
</Location>
<Location />
Order Deny,Allow
Deny From All
Allow From 192.168.0.0/16
</Location>
# Lines below are automatically generated - DO NOT EDIT
<Location /printers/lp0>
Order Deny,Allow
Deny From All
Allow From 192.168.0.0/16
AuthType None
Allow from All
</Location>
Browsing On
BrowseProtocols cups
BrowseOrder Deny,Allow
BrowseAllow from @LOCAL
BrowseAddress 255.255.255.255
Listen *:631



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