As a new user of LooknStop I thought I would post some observations for other user's comments. Application Filtering can pick up the same application twice - one with C:\PROGRA~1\... and one with C:\PROGRAM FILES\... Internet Filtering MASK option in a rule did not work as I expected - I provide a mask 192.168.1.1/255.255.255.0 and expected it to apply to IP's 192.168.1.1 to 192.168.1.255 but it did not - it appears as if the mask works by partial matching i.e. MASK 0.0.0.255 would find all x.x.x.255 packets Internet Filtering - use of the !! pop up messaging does not appear to work even when Log Message Box is selected in the Options Tab. I selected an Internet Filtering Rule that I know is being used and enable the advanced options to provide the advanced columns. I then enable the !! option for that rule and expected a pop up each time a packet matched the rule - so far no pop ups. Application Filtering - No Option to sort list by clicking on the relevent title. Confusion over traffic filtering direction - Previous Firewalls I have used dealt with the whole communication whereas LooknStop deals with each packet. For Instance I setup a Rule to allow outbound HTTP PC>>Internet - Stating that I wanted to allow packets to port 80 where they originate from my PC - this rule by itself does not work as LooknStop will block the returning data even though it came back on the already established outbound connection to remote port 80. LooknStop either requires 2 rules or enabling the Internet >> PC & PC >> Internet option. After a steep learning curve I quite like looknstop and continue to learn as I go on.