On Wed, Mar 23, 2016 at 7:57 PM, François Patte <francois.patte@mi.parisdescartes.fr> wrote:
Bonsoir,

I am wondering what is in mind of packagers.... I have just fought for a
couple of days to have  the printing service working on a fresh fc23
install.

1- cups-browser.service is not enabled by default. cups.service is
enabled but you cannot add printers. ok! With a little work, you can
find why you cannot add printer.

2- Once this service is enabled, you can add your printer: your network
printer is found without any problem, you can find the right driver in
the default printer list.... So far so good! Then you test your install
sending a test page and.... "filter failed"! What does that mean?

3- googleling gives you tons of results and none of them give a
solution: filter failed, filter failed.... What is this filter? driver?
Is my printer too old and none of the new drivers will work? Must I buy
a new printer?.....

4- A light comes to you: "and if it was a firewall problem?"    Hurrah!
You have found the solution....

Will it be so difficult in the install process to enable the browser
cups service at the same time the cups service is enabled (and it is
enabled by default)? Is it so difficult to add an accept rule for port
631 to iptables if cups service is enabled or, at least, send a warning
when cups is enabled in order to remember to root to enable port 631 in
iptables rules?

I had much the same experience this week with SL7 and apcupsd.

Fedora exists because there are many such issues that make the
difference between a robust distribution and a collection of packages.
When (nearly) all issues like this are solved you have RHEL..

The two of us really should file bug reports against cups and apcupsd
packages with the proposed firewall configuration details.  I would have
done this, but the system in question is off net which adds enough
extra hassle that I probably won't get around to filing a bug report. 

 

I am just wondering....

Regards.

--
François Patte
UFR de mathématiques et informatique
Laboratoire CNRS MAP5, UMR 8145
Université Paris Descartes
45, rue des Saints Pères
F-75270 Paris Cedex 06
Tél. +33 (0)1 8394 5849
http://www.math-info.univ-paris5.fr/~patte


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George N. White III <aa056@chebucto.ns.ca>
Head of St. Margarets Bay, Nova Scotia