option dest wan
option mtu_fix 1
+# We need to accept udp packets on port 68,
+# see https://dev.openwrt.org/ticket/4108
+config rule
+ option src wan
+ option proto udp
+ option dest_port 68
+ option target ACCEPT
+
# include a file with users custom iptables rules
config include
option path /etc/firewall.user