What it checks
firewalld/ufw/nftables active.
Why it matters
No host firewall risks exposing every port.
How to fix
Enable the firewall with a default-deny policy.
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.