‘firewall-tui’ Not Working in CentOS 6.6? [Fix]

I run several versions of CentOS in virtual machines. Recently I downloaded the 6.6 ISO image (minimal edition) and after installing it & the ‘firewall-tui’ package (since it is not included by default in the ‘minimal’ edition), while trying to run it, ‘firewall-tui’ gave me an error and quit.

Now of course you can deal with the firewall strictly through the command-line interface, but I sometimes find it convenient to use a basic GUI (‘ncurses’ to be precise). So I had a quick look at the error and found a simple solution that fixed the issue 🙂 . All you have to do is comment out a certain line.

But please remember that, I am not a programmer, therefore I do not know if this is a code that should necessarily be there (it is not present in CentOS 6.5 however) that I am commenting out. So far so good though .

'firewall-tui' returning error in CentOS 6.6 minimal edition

'firewall-tui' successfully running on CentOS 6.6
After the ‘correction’…

Step 1: To fix the situation, we have to edit a Python configuration file related to ‘firewall-tui’. For that, enter the below command and it will take you directly to the line where the issue is.

Locating the 'firewall-tui.py' file's issue - CentOS 6.6 minimal edition

vi +34 /usr/share/system-config-firewall/fw_tui.py

Step 2: Now simply comment out the ‘import fw_nw’ code (by adding a # sign at its beginning) as shown in the below screenshot (if you’re new to ‘vi’, then press the ‘i’ key and then type it in).

Correcting the 'firewall-tui.py' file's issue - CentOS 6.6 minimal edition

Once done, save your changes and exit (press the ‘Esc’ key and then type ‘:wq’). That is it. Now try running the ‘firewall-tui’ and it should work. Good luck.

10 thoughts on “‘firewall-tui’ Not Working in CentOS 6.6? [Fix]”


    To use the Firewall CLI package ‘system-config-firewall-tui’ a few extra dependencies need to be installed that by default are not resolved.

    Install dependencies and start required service, then the firewall utility should start without error.
    1- yum install system-config-firewall-tui dbus dbus-python
    2- service messagebus start
    3- system-config-firewall-tui

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