Hi Marco, Go to System > System Services > DoS & Spoof Protection > DoS Settings. See if there are any configured DoS settings for ICMP. Further, DoS attacks are typically executed by sending many request packets to a targeted server (usually Web, FTP, or Mail server), which floods the server's resources, making the system unusable. Their goal is not to steal the information but disable or deprive a device or network so that users no longer have access to the network services/resources. ICMP/ICMPv6 attack sends huge amounts of packet/traffic so that the protocol implementation of the host/victim computer cannot handle, thereby preventing legitimate packets from getting through to their destination. Configure a value that compliments your network architecture to avoid drops. Thanks
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