HBSS
Host Based Security System
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HBSS was the US Department of Defense's mandated endpoint security suite, bundling host firewall, intrusion prevention, and policy auditing to give central visibility across millions of military machines. It became the DoD standard for host defense through the 2000s and 2010s. The department has since moved toward its Endpoint Security Solutions program, but the HBSS name still appears constantly in defense job postings and clearance-required roles.