An Open Port You Didn’t Know About Is an Attacker’s Way In
Firewall rules drift. A debug port gets opened during an incident and never closed. A new service binds to a public interface instead of localhost by mistake. None of this shows up in an uptime check it shows up in a port scanner’s results, usually run by whoever finds it first.
Seabhac.io runs scheduled nmap-based port scans against your hosts, so you’re the one who finds the unexpected open port, not an attacker doing reconnaissance.
How it works:
- Target any host: Scan a full port range or a specific set you care about.
- Nmap-powered scanning: Real port scans on your schedule, not a cached or simulated result.
- Diff against expectations: Get alerted when a port opens that wasn't open on the previous scan.
Catches Configuration Drift, Not Just Intrusions
Most unexpectedly open ports aren’t the result of an attack they’re the result of a deploy, a firewall rule change, or a service misconfiguration that nobody flagged for review.
- Verify firewall rules are actually being applied, not just that they were written.
- Detect exposed services before attackers do the same scan a bad actor would run against you, run by you first.
- Track changes over time so a newly opened port during a deploy window is easy to trace back to its cause.
Clear, Actionable Results
Every scan returns the full list of open ports and, where identifiable, the service listening on each one enough detail to go straight to fixing it, not just knowing something’s wrong.