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Router receiving "Self2WAN ICMP type b Detected"

VileReynard
All Star
Posts: 11,202
Thanks: 307
Fixes: 11
Registered: ‎01-09-2007

Router receiving "Self2WAN ICMP type b Detected"

Quote
Self2WAN ICMP type b Detected! - To prevent from revealing router's activity, this packet is dropped!

My router has recently been getting loads of the above message, recently.
I assume this being sent externally?