Infrastructure
Common Processing Implementation When Receiving UDP Packets
→ 日本語版を読むWhen an externally exposed system receives a UDP packet:
Ignore the packet. Do nothing. Don't write logs either. Writing logs carries the risk of an attack that fills up the disk.
When a system not exposed externally receives a UDP packet: Ignore the packet, but write an "ignore packet" type log (writing logs is preferable, because it allows you to confirm packet reception).