ipfw add 16005 unreach6 address ipv6 from any to 2001:4de0:ac10::1:1:14 gives unreach6 address16005 ip6 from any to 2001:4de0:ac10::1:1:14 And "ipfw show 16005" prints (some spaces between columns are removed) unreach6 address16005 80 5574 ip6 from any to 2001:4de0:ac10::1:1:14 -- // Lev Serebryakov