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From the article: "This drops all ICMP packets. ICMP is only used to ping a host to find out if it’s still alive."

Please stop this non-sense, there are too many ICMP blackholes already.

if you are running IPv6, disabling ICMP is a very bad idea because it disables MTU path discovery.

don't be lazy, don't drop ICMP and just do proper filtering.

Same for ipv4.