Mikrotik Block facebook by IP address

1. check the list of facebook IP

http://bgp.he.net/AS32934#_prefixes

2. create access-list "facebook-ip"

74.119.76.0/22
173.252.64.0/18
204.15.20.0/22
66.220.144.0/20
69.171.224.0/19

3. create rule in firewall to block facebook-ip

done!!!