unable to monitor vpn traffic

[nas_sheikh]

I have a pc in my environment which uses a vpn to connect to a client site, my question is there a way to monitor traffic via checkpoint when the machine is connected  to the vpn, because i can only see in the logs when the connection is made to the vpn and the ip but after the connection is successful with the vpn i cant see any traffic going through even though user confirms that he is sending data. 

Thanks