Unknown Tx rate

Hello, i have vdsl in bridge mode on ether1 with pppoe client. Ethernet 2 to 5 are in bridge mode.
My problem its huge traffic on ether1 and pppoe-out1, i dont know where ends this traffic, because all devices are connected to bridge and have only 70kbps Tx rate.

Any suggestions, because i am done…
screen.jpg

Fairly obviously, it’s coming from the WAN.
Check your firewall rules (you probably need to substitute pppoe-out1 for ether1 in the relevant rules).