What is Port Scanner
This tool checks target host port reachability to help verify whether services are open and network rules are taking effect.
Key Features
- Scan by common presets, custom lists, or port ranges.
- Show real-time progress, current port, and summary stats.
- Mark ports as open, closed, or filtered with common service hints.
- Export results and keep local scan history.
Steps
- Enter a target domain or IP.
- Choose scan mode (common, web, database, custom, or range).
- Start scan and wait for result updates.
- Filter by status, export CSV, or reuse history entries.
FAQ
Why is a port marked as "filtered" instead of "closed"?
It usually means firewall or network policy blocks the probe, so the tool cannot confirm a definitive closed state.
Is this equivalent to a full security audit?
No. It is intended for connectivity troubleshooting. Full security assessment still needs professional scanners and server-side log analysis.