Netbios broadcast storm from wan ip

[g.ca13]

Hi
Looking at the logs of my pfsense I noticed that my wan address that my ISP gives me tries to access the wan address of the pfsense with port 137 every couple of minutes but I don't understand what it depends on. The pfsense is connected to my isp's router and receives an address from the ISP-router's dmz. Does anyone have an idea?

[michmoor]

@g-ca13
ISP uses Microsoft server. To hand out DHCP addresses but unfortunately windows protocol messages are being sent on the same segment.
Just a guess. Either way it’s being blocked which is a good thing