Criar duas regras.

Criar a primeira regra em Usuarios > Firewall, com os seguintes IP´s:

163.70.140.60/31
163.70.141.60/31
163.70.142.60/31
163.70.143.60/31
163.70.144.60/31
163.70.145.60/31
163.70.146.60/31
163.70.147.60/31
163.70.148.60/31
163.70.149.60/31
163.70.150.60/31
163.70.151.60/31
163.70.152.60/31
163.70.153.60/31
163.70.154.60/31
163.70.155.60/31
163.70.156.60/31
163.70.157.60/31
163.70.158.60/31
163.70.159.60/31
179.60.192.49/32
179.60.192.51/32
179.60.193.60/31
179.60.194.53/32
179.60.194.54/32
179.60.195.49/32
179.60.195.51/32
185.60.216.53/32
185.60.216.54/32
185.60.217.53/32
185.60.217.54/32
185.60.218.53/32
185.60.218.54/32
185.60.219.60/31

Criar a segunda regra em Palavras Chavesem Usuarios > Palavras Chaves:

.*.cdn.whatsapp.net
g.whatsapp.net
graph.facebook.com
graph.whatsapp.com
media-.*.cdn.whatsapp.net
media..*.fna.whatsapp.net
mmg.whatsapp.net
pps.whatsapp.net
static.whatsapp.net
v.whatsapp.net

E adicionar as respectivas regras em GERAL, Departamento ou Usuario