Comment 5 for bug 1275032

Uhm... Could you try the last version please? :) (It works in Ubuntu 13.10):
sudo apt-get purge gufw ; sudo rm -r /etc/gufw ; wget https://launchpad.net/gui-ufw/gufw-14.04/14.04/+download/gufw_14.04.1.deb ; sudo dpkg -i gufw_14.04.1.deb

As you can see in the attachment screenshots:
 1. User enters port 22 and he can set the protocol in the combobox Protocol.
 2. User enters port 22/tcp and some fields will be disabled (as IP).

As I told you, there are dragons there :P I just don't remember the case, but ufw was not allowing a specific command and then I preferred to guarantee the user's entry enabling/disabling fields and ensure that any command will be right.

The current Gufw is a LTS, then I'm so sorry, but I'll not change this behaviour now :S But I'll think in your proposal either! ;)