What it checks
MySQL/PostgreSQL/Redis/Mongo listening on 0.0.0.0.
Why it matters
Directly exposed databases are a mass-exfiltration surface.
How to fix
Restrict to internal/firewall, narrow the bind address.
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.