Packet filtering with iptables

[noraworld]

• https://qiita.com/qiita_phmk/items/48c1909cc74a61e5cace
• https://qiita.com/leomaro7/items/5150d9154dce107e457d
• https://unix.stackexchange.com/questions/137904/how-to-do-domain-filtering-in-linux
• https://qiita.com/shijimi_san/items/861e79d1137bdacdab68
• https://askubuntu.com/questions/1027934/ufw-not-blocking-although-drop-policy

[noraworld]

How can I find all YouTube IP addresses...?

https://stackoverflow.com/a/19385835

[noraworld]

I finally achieved it with this video solution:

https://www.youtube.com/watch?v=7GVG_rnefjc

[noraworld]

This didn't work well by the way:

https://io.sivuduuni.biz/block-youtube-with-iptables/