We can block Facebook and YouTube from Laptop/Desktop and also from Mobile APPs
*** Blocking Facebook
Login MikroTik via Winbox: Goto "IP" -> Firewall -> Layer7 Protocol
+ Add => Name = Facebook ,
Regexp :
^.+(facebook.com|apps.facebook.com|
www.connect.facebook.net|m.facebok.com|staticak.connect.facebook.com|login.facebook.com|fbcdn.net ).*$
** Now add Filter rules for your local network 192.168.1.0/24
IP -> Firewall -> Filter Rules-> ADD -> Forward chain -> SRC Address: 192.168.1.0/24
Advance -> Layer7 Protocl = Facebook => Action =DROP
*** Blocking YouTube
Goto: IP --> Firewall --> Filter --> Add -> Chain=Forward --> SRC Address: 192.168.1.0/24 -> advance--> Content="googlevideo", Action= Drop
Goto: IP --> Firewall --> Filter --> Add -> Chain=Forward --> SRC Address: 192.168.1.0/24 -> advance--> Content="youtube", Action= Drop
==================== Enjoy ######################################