Want to understand the difference between free and non-free, restricted and unrestricted software? The following system notifications provide a big clue:
System notification Ubuntu Linux style
System notification Windows 7 Starter Edition style
FOSS to the rescue again. Earlier today I found myself using a pencil and paper to work out some IP address-CIDR prefix combinations required to make up an address range that I needed to add to Firestarter’s policy rules. I thought, “This is madness, there’s got to be something in the Ubuntu repositories”. There was, of course, both command line and GUI tools. I use GNOME so installed the GNOME Internet Protocol Calculator, which was written by Samuel Abels, a Debian community member (I think). What a straightforward and excellent tool this is. Wish I’d had it 10 years ago when I was supporting NT4 networks.
GNOME Internet Protocol Calculator
