 PF Blocker NG is a really popular tool inside of PF Sense for DNS blocking. I'll leave a link to the full video I've done on this in the description, but I want to do a short video on just how to add something to the whitelist. Our goal today is to whitelist the Twitter analytics. So we go over here, scroll down to the DNS pale whitelist, we'll scroll down to the bottom and we're going to add analytics.twitter.com and we're going to click save. Now, the mistake many people make is thinking this by putting that in there, that if we look this up again, it's going to get a different result and work, but it doesn't. It still is sink hold, but what we need to do to make this work, and this is the part a lot of people miss, is any change you make in PF Blocker has to be reloaded. So we're going to hit run, reload this and once DNS resolver reloads here, we can switch back over and do another lookup and see that it's resolving. As I said, I have a full video on PF Blocker down in the description below and thanks.