ICMP Smurf Amplification & Broadcast Reflection Attack Era

Spoofed ICMP Echo Requests sent to directed-broadcast addresses caused every host on the target subnet to simultaneously reply to the victim IP. On a typical /16, each spoofed packet elicited hundreds of replies, yielding amplification factors above 100 and saturating victim links with volumetric traffic that no single ingress could absorb. The attack required no exploit — only a misconfigured default that routers accepted broadcast-bound packets at all.