FM / icmp

/proc/sys/net/ipv6/icmp

Name	Mode	Actions
echo_ignore_all	0644	edit dl rm
echo_ignore_anycast	0644	edit dl rm
echo_ignore_multicast	0644	edit dl rm
errors_extension_mask	0644	edit dl rm
error_anycast_as_unicast	0644	edit dl rm
ratelimit	0644	edit dl rm
ratemask	0644	edit dl rm

Edit: /proc/sys/net/ipv6/icmp/echo_ignore_anycast (0B)