How to Block facebook messenger and allow facebook browsing only. I dont want to install signature

[maloy]

How to Block facebook messenger and allow facebook browsing only. I dont want to install signature in client end mobile app or browser. how will i block the only messenger?
Device name: Fortigate_50G
Firmwire version: 7.4.9

[jiahoong112]

For this, you will have to use a firewall policy with Application Control: https://community.fortinet.com/t5/FortiGate/Technical-Tip-Block-Facebook-while-allowing-Messenger/ta... 

[maloy]

Thanks jiahoonsg112. But it can't block the facebook messenger app, also need deep inspection. Is there any other way to block the messenger app with only ssl inspection not deep inspection ?

[yderek]

Deep inspection is required for this , SSL inspection only inspect the header of the packet which might not help you to block  facebook application in this case hence the KB mention Deep inspection is required