tcpdump -i re0 udp port 9
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on re0, link-type EN10MB (Ethernet), capture size 96 bytes
02:11:57.037872 IP XXXXXXXXXXX.49266 > XXXXXXXXXXXXXXX.discard: UDP, length 102
02:11:57.037975 IP XXXXXXXXXXXXXX.63251 > 192.168.8.255.discard: UDP, length 102
02:11:57.038094 IP XXXXXXXXXXXXXX.53431 > nas.alixdomain.local.discard: UDP, length 102
02:11:57.038169 IP XXXXXXXXXXXXXX.54302 > 192.168.8.255.discard: UDP, length 102
02:11:57.038200 IP XXXXXXXXXXXXXX.54631 > nas.alixdomain.local.discard: UDP, length 102
02:11:57.038276 IP XXXXXXXXXXXXXX.49241 > 192.168.8.255.discard: UDP, length 102