If I remember correctly, I did have the Mac firewall up and there was a problem and my ISP guy told me there could be a conflict. It's been so long ago I can't remember now. But, I'm not Leary of him at all having dealt with him several times and lots of times in person where he makes free house calls!
From what I can see, LS is free. Would you explain what you mean be "wearing?"
I'd like to hear what others have to say about your firewall conflict.
LS costs $35, but it's got a "free" mode in which you've got to restart it every three hours.
Little Snitch 3.7.4
Little Snitch offers a free, built-in demo mode that provides the same protection and functionality as the full version. The demo runs for three hours, and it can be restarted as often as you like. The Network Monitor expires after 30 days.
LS inundates you with connection requests, the specifics of most of which you've got no idea about, and deciding which ones to allow or disallow for now or forever will wear you down.
