All DDoS Definitions
DDoS Testing Definition

LOIC (Low Orbit Ion Cannon)

LOIC (Low Orbit Ion Cannon) is DDoS attack tooling, one of the commodity instruments a DDoS test safely and lawfully reproduces in a controlled, authorized form. It is an open-source stress-testing application that floods a target with TCP, UDP, or HTTP requests from the machine it runs on. Originally a load-testing utility, it became notorious as the tool behind several volunteer "hacktivist" campaigns, where many operators pointed their copies at one target at the same time. A successor, HOIC (High Orbit Ion Cannon), focuses on HTTP floods with request randomization.

LOIC: many volunteers, one target, no anonymity No botnet. No skill barrier. No source anonymity: each operator's real IP is exposed. Volunteer PC 1 runs LOIC · real src IP Volunteer PC 2 runs LOIC · real src IP Volunteer PC 3 runs LOIC · real src IP Volunteer PC 4 runs LOIC · real src IP Volunteer PC 5 runs LOIC · real src IP One target many independent copies firing at the same time Absorbed at the edge basic rate limiting + IP reputation soak it The danger is coordinated volume, not sophistication: one tool, no skill barrier, and no source anonymity. A test confirms commodity tools like this are soaked up long before advanced vectors are needed. BlackNeuron™
LOIC as many volunteers each firing their own copy at one target with no source anonymity, a commodity flood absorbed by basic rate limiting and IP reputation

Why it matters in DDoS testing

LOIC sets the realistic low end of the threat: a single tool, no botnet, no skill barrier. It also offers no source anonymity, so its real-world danger comes from coordinated volume rather than sophistication. A test confirms that basic rate limiting and IP-reputation controls absorb this commodity traffic long before more advanced vectors are even needed.

For where this sits among attack classes, see Understanding DDoS Attack Vectors.