$ sudo iptables -L -n -v
Chain INPUT (policy ACCEPT 22873 packets, 5056K bytes)
pkts bytes target prot opt in out source destination
0 0 DROP udp -- bat+ * 0.0.0.0/0 255.255.255.255 udp spt:68 dpt:67
Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
Chain OUTPUT (policy ACCEPT 2031 packets, 446K bytes)
pkts bytes target prot opt in out source destination
0 0 DROP udp -- * bat+ 0.0.0.0/0 255.255.255.255 udp spt:67 dpt:68