Run safe public checks
DNS, email security (SPF, DKIM, DMARC), TLS/HTTPS, and HTTP headers — every module is passive, rate-limited, and non-invasive.
Safe external posture checks
Find your weak spots before attackers do.
Ferrum Sentinel runs safe, public checks on any domain — DNS and email security, TLS, and HTTP headers — then turns them into a cyber health score, prioritized findings, and clear remediation you can act on.
Free, no account needed · safe public DNS & email checks
Get a clear health score
Each scan rolls up into a weighted cyber health score and an A–F grade your leadership will actually understand.
Prioritize & remediate
Findings are deduplicated, ranked by severity and exposure, and paired with plain remediation steps you can track to resolution.
Share professional reports
Generate branded HTML & PDF reports for clients or the board — posture trends, findings, and the action plan, ready to send.
-
1
Enter a domain
Add a domain and verify ownership for deeper, authorized checks.
-
2
Run a scan
Sentinel runs the safe public modules and snapshots the results.
-
3
Review score & findings
See the health score, prioritized findings, and remediation guidance.
-
4
Report & track
Export a professional report and watch posture improve over time.
Ferrum Sentinel only ever performs safe, low-impact public checks. It is not a penetration test — it never guesses credentials, floods a target, or touches private systems. It reports what is detected or not detected, never scare stories.
Check your domain's posture this week.
Run a free scan, see your score, and share the report — in minutes.