Hello,

I used Layer 7 blocking method to block Youtube and Facebook in my network. Now no one can access those sites using browser. No one can access facebook using android app too. But users still get access to youtube using android app, and they can watch videos. I need to stop this. Please someone help. Thanks.

Layer7 for YouTube and Facebook?!? Does that actually work? I'm guessing no one has yet tried to manually type "https" in the address bar (i.e. you have no users THAT knowledgeable)?

On that note, I believe the YouTube app uses HTTPS from the start (without making the user type anything), which is why you're not blocking it.

You can drop DNS packets to youtube.com/facebook.com, and also redirect all DNS requests to your router's DNS (to make sure users don't easily bypass it). Initially, users will still have access due to their device's DNS cache, but soon it will expire, and they won't.

In theory, users could bypass this restriction, even on an Android phone, by modifying their hosts file, but in practice, most users don't know how to do that, so you're safe.

very very important post ,, I need to block all app (have calls) for example viber and tango and other (more) etc ,, if you have idea plz write here in comment ,
plz now write your method for layer 7 (code or what) .. ?
and write Steps from start to end ..
thanks

Here a lab showing you how to block Youtube Android App in RouterOS

https://www.youtube.com/watch?v=6oAiUGAsfEY