The Defense Information Systems Agency (DISA) develops and publishes Security Technical Implementation Guides, or "STIGs." DISA STIGs provide technical guidance for hardening systems and reducing threats.
The Defense Information Systems Agency (DISA) is the U.S. Department of Defense (DoD) combat support agency responsible for maintaining the security posture of the DOD Information Network (DODIN). One of the ways DISA accomplishes this task is by developing, disseminating, and mandating the implementation of Security Technical Implementation Guides, or STIGs. In brief, STIGs are portable, standards-based guides for hardening systems. STIGs are mandatory for U.S. DoD IT systems and, as such, provide a vetted, secure baseline for non-DoD entities to measure their security posture.
Vendors such as VMware submit suggested security hardening guidance to DISA for evaluation, based on DISA protocols and feedback. Once that process is complete, the official STIG is published on the DISA organization’s web site at https://public.cyber.mil/stigs/. VMware provides security baselines and hardening guidance for vSphere as part of the vSphere Security Configuration Guide. See https://core.vmware.com/security.