What it checks
Ownership/permissions of the shadow file (640/000).
Why it matters
Read exposure enables offline hash cracking.
How to fix
chown root:shadow, chmod 0640 (per distro standard).
InfraGuard runs all 36 checks across your servers at once and grades each host A–F.
Track these versions on your own servers
InfraGuard collects installed software versions from every server and flags the ones with known vulnerabilities. Self-hosted — nothing leaves your network.