What it checks
net.ipv4.ip_forward (0 unless a router).
Why it matters
Needless forwarding becomes a pivot/relay path.
How to fix
If not a router, set ip_forward=0.
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.