I am a newbie, so my apologies up front.

I am trying to get DansGuardian installed (which I believe I have) and working. To get it working I need to filter IP traffic through the app via iptables. There are appropriate commands in the 'Getting DansGuardian working on Ubuntu' page. My issue is that the system is telling me that iptables is not currently installed - which is wrong. I understand that it is the primary firewall service for Ubuntu.

I have tried:

xyzzy@ubuntu:/usr/sbin$ iptables



The program 'iptables' is currently not installed.  

You can install it by typing:

sudo apt-get install iptables

So:

sudo apt-get install iptables

Reading package lists... Done



Building dependency tree



Reading state information... Done



iptables is already the newest version.



The following package was automatically installed and is no longer required:



  thunderbird-globalmenu



Use 'apt-get autoremove' to remove them.



0 upgraded, 0 newly installed, 0 to remove and 342 not upgraded.

Only to be told that the version I am running is the latest.

ufw is running.