Hello @Flavio_Vieira ,
As content filtering looks at the URL information, configuring an MX for track by IP (or) MAC would be okay.
Tracking by IP would mean you need your MX to track client traffic by IP. This is a configuration you would use most when you have a layer 3 device downstream of the MX handling inter-vlan communication.
To be able to track your client traffic more accurately I would recommend you track by IP (meaning you will need to split the network).
Again this will not impact the way your MX handles content filtering.
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