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on my TRB 140 (FW TRB1_R_00.07.00.1) in Status > Log > Traffic log, I do not see any egress traffic from LAN interface, just ingress. 
In Status > Real Time Data > Traffic > LAN intfc. I see inbound and outbound traffic, but in log only inbound.
I just wanted to see if my port forwarding works correctly.

Regards, Andrej


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to see all traffic you can use TCPdump. Tcpdump is command-line packets sniffer tool which is used to capture or filter TCP/IP packets that received or transferred over a network on a specific interface. You can simply go to Gateway WebUI System > Administration > Troubleshoot There at the Troubleshoot section, at the bottom you will have Enable TCP dump option, Enable it, choose mobile interface (since as I understand you want to get information on mobile data used) then Save & Apply the changes.

After doing that leave TRB to operate to accumulate the data, then go to same section of WebUI and download TCP dump file for investigation. Use WireShark application to analyze TCPdump file.

Or use CLI/SSH client and run tcpdump command to see traffic in real time. You may refer to this link (section 7.) for more information: