So?

I have installed NXFilter. It require to block port 53 (TCP and UPD). You can read it here: https://www.nxfilter.org/tutorial.html#client-setup "If you have a firewall you can force your users to use...

Please, can someone help me?

I need to block the port 53 (TPC and UDP) on my Archer D50 but i can't do it. There are threads about this but i'm in confusion Can someone help me?

Here you are: It doesn't work with .edu too. I've typed .edu in the black list

I have the Archer D50. In the user guide (page 52) there's written: 9. Click Add a New Keyword. You can add up to 200 keywords for both Blacklist and Whitelist. Below are some sample entries to allow...