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Revision as of 15:03, 16 March 2012 by Jpopelka (talk | contribs)


This is the test case to check if it's possible for other applications (system-config-printer in this case) to modify the firewall.

How to test

1. Prerequisites

First get and install testing packages system-config-printer-1.3.9-2.firewalld.fc17

Then you need to have firewalld running, see Test case 1.

Also the network interface should be in a zone. Either run NetworkManager (see Test case 3), which adds the interface into zone or add it yourself with

 firewall-cmd --add --interface em1

2. Run system-config-printer

 system-config-printer --debug

Click the blue 'plus' button. After entering your password you should see a dialog asking you if you want to adjust firewall. Whether you see the dialog and what items the dialog contains depends on what zone the interface is in. For example: In 'trusted' zone you won't see the dialog at all because all trafic is trusted. In 'work' zone it will ask you for allowing of 'mDNS traffic'. In 'public' (the default) it will ask you also for allowing of 'IPP Browse packets'. Press 'Adjust Firewall'.

3. Check

After this the needed services should be allowed for 60 seconds, see

 firewall-cmd --list=all

and check that you see ipp-client, mdns and ipp services.

In the output of system-config-printer --debug you should see something similar to:

 Using FirewallD, active zone: public
 Examining firewall
 Asking for permission to adjust firewall:
 The firewall may need adjusting in order to detect network printers.  Adjust the firewall now?
 - Allow all incoming IPP Browse packets
 - Allow all incoming mDNS traffic
 Fetching devices after firewall dialog response