+config rule
+ option name Allow-ICMPv6-Input
+ option src wan
+ option proto icmp
+ list icmp_type echo-request
+ list icmp_type destination-unreachable
+ list icmp_type packet-too-big
+ list icmp_type time-exceeded
+ list icmp_type bad-header
+ list icmp_type unknown-header-type
+ list icmp_type router-solicitation
+ list icmp_type neighbour-solicitation
+ option limit 1000/sec
+ option family ipv6
+ option target ACCEPT
+
+# Allow essential forwarded IPv6 ICMP traffic