hi i am from afghanistan which i am a mikrotik user now i work in an ISP which made me to block facebook pages and account which i use many ways but it not work after that i was to be forced which get communication with you now i demand to help me in this process.
Use only your routerboard for clients DNS server, drop udp and tcp 53 in forward chain , finally make static dns enty for facebook with regex ^(.)(facebook)(.)$ on address 172.0.0.1 !
Don’t remember to flush dns cashe.