UDP testing and sniffing on Linux
This post shows how you can send out test UDP packets from an Alpine Linux machine, and use tcpdump to sniff UDP packets.
Install netcat in the machine and try sending out UDP packets to some host at port
apk update apk add netcat-openbsd nc -u -p 8000 172.20.36.98 8001
The UDP socket is bound to port
8000. Type in any text and hit enter key to send.
tcpdump to see UDP packets with port
8000 on interface
apk add tcpdump tcpdump -vv -x -X -i eth0 "port 8000"