No host firewall active
No active firewall rules detected. All listening ports are reachable from any network the host is connected to, unless protected by network-level ACLs (VPC, cloud SG, on-prem ACL).
Remediation
When this rule fires on one of your servers, the dashboard alert detail page renders the full remediation guidance: the command to run, what to verify after, and Furnace's annotation for your specific distro + hardware. Sign in at app.glassmkr.com to see the live alert.