The hosts are most likely part of a reflective denial-of-service attack. A reflective denial-of-service attack is a technique that allows attackers to both magnify the amount of malicious traffic they can generate and obscure the sources of the attack traffic. This type of distributed denial-of-service (DDoS) attack overwhelms the target, causing disruption or outage of systems and services. A reflective denial-of-service attack works by spoofing the target's IP address and sending requests to vulnerable servers that will respond to the target. The servers act as reflectors that bounce back the responses to the target, amplifying the attack volume and hiding the attacker's identity1. The output shows that host 10.20.30.40 is sending requests with a spoofed source IP address of 192.168.1.10 to host 203.0.113.15 on port 123, which is used by the Network Time Protocol (NTP). NTP is a common protocol used for reflection/amplification attacks, as it can generate large responses to small requests2.