IPV6 ICMP Scanned?

[rspoerri]

Hi, im pretty new to the opnsense firewall after my turris omnia suddently stopped working.

Now i am having something that looks like a ipv6 ping scan in the firewall logs. Approximately 6 to 10 times per second with changing destinations. (see the attachment).

First i am unsure whether this can be problematic. And if so, how could i prevent further scans (because i dont seem to be able to edit the default rules).