I'm evaluating LnS and I'm very pleased with it so far. I tried most of the tests at http://www.firewallleaktester.com/tests.php LnS failed a few of them. Most importantly: Copycat DNSTester PCAudit2 Wallbreaker (tests 1 and 3 (test 4 not applicable)) My tests agree with the website which also says that LnS fails these tests. LnS passes Copycat if I choose a process without internet access, but fails if I choose my web browser. LnS does prompt me sometimes when I run PCAudit2, but as soon as PCAudit2 finds a process on my computer with internet access, there is no prompt from LnS and so the test fails. I've read some posts by LnS users who say that LnS passes these tests. I don't disagree with them, but it seems to me that there must be a reason for this. Perhaps it's because of (1) their LnS internet rules, app rules, or settings, or (2) because they have installed other software on their computers that pass these leak tests (and makes it seem like LnS is passing the tests). Personally, I did a clean install of LnS and I'm using the Enhanced ruleset. It seems that LnS does not pass these leak tests with its default settings. I am not currently using any software such as PG or SSM. The details of my settings are at App Filtering not checking grandparent processes? (WallBreaker) As WSFuser suggested to me in that topic, I intend to start using additional software such as PG or SSM to protect against these leaks. However, since the authors of LnS are trying to pass these leak tests, I think that it's important for me to tell them that it's not working on my computer but that I hope that LnS will pass these leak tests in the future. Even if I start using software such as PG or SSM, I think that it's important to have layers of protection, so it would be nice if I could trust LnS to pass these leak tests in case my other software fails.