Bulk Port Scanner - Free Online IT Tool

📡 Bulk Port Scanner

Scan common ports across multiple hosts simultaneously.

Hosts (comma separated)

Ports to Scan

ℹ️ About Bulk Port Scanner

The Bulk Port Scanner is a lightweight network auditing tool that identifies open services across a group of servers. In IT security and system administration, knowing which ports are accessible from the outside is the first step in vulnerability management and service verification.

This tool attempts to establish a TCP connection to each specified port on every host provided. If the connection succeeds, the port is marked as 'OPEN'. This is essential for verifying that firewalls are correctly configured, ensuring that web servers are responding on the expected ports, and detecting unauthorized services that might be running on your network.

📖 How to use Bulk Port Scanner

1. Enter up to 5 hostnames or IP addresses, separated by commas.
2. Select a common port preset (Web, Admin, DB) or provide your own comma-separated list.
3. Click 'Run Tool' to perform the sequential scan.
4. Review the results table to identify which ports are 'OPEN' on each host.

❓ Frequently Asked Questions

Is this a full 'nmap' replacement?

No. This is a basic TCP connect scanner designed for quick sanity checks and troubleshooting. For deep security audits, specialized tools like nmap are recommended.

Why does it show 'CLOSED' even if the service is running?

A 'CLOSED' result means the connection was refused or timed out. This often happens if a firewall is blocking the request or if the service is only listening on a local/internal interface.

Is it legal to scan these ports?

You should only use this tool on systems you own or have explicit permission to audit. Unauthorized scanning can be viewed as a precursor to an attack.