Revert "fix: remove WAN link-local firewall exception"

Author: G10h4ck

packages/lime-proto-wan/files/usr/lib/lua/lime/proto/wan.lua

@@ -49,6 +49,19 @@ function wan.setup_interface(ifname, args)
 	end
 
 	uci:save("network")
+
+	--! Accepting link local traffic also on WAN should not cause hazards.
+	--! It is very helpful in cases where the devices have problem to the other
+	--! ports, to have at least an addictional way to enter for rescue operation
+	local ALLOW_WAN_LL_SECT = "lime_allow_wan_all_link_local"
+	uci:set("firewall", ALLOW_WAN_LL_SECT, "rule")
+	uci:set("firewall", ALLOW_WAN_LL_SECT, "name", ALLOW_WAN_LL_SECT)
+	uci:set("firewall", ALLOW_WAN_LL_SECT, "src", "wan")
+	uci:set("firewall", ALLOW_WAN_LL_SECT, "family", "ipv6")
+	uci:set("firewall", ALLOW_WAN_LL_SECT, "src_ip", "fe80::/10")
+	uci:set("firewall", ALLOW_WAN_LL_SECT, "dest_ip", "fe80::/10")
+	uci:set("firewall", ALLOW_WAN_LL_SECT, "target", "ACCEPT")
+	uci:save("firewall")
 end
 
 return wan