Port Checker
Check if a port is open or closed on a server.
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About Port Checker
What is the Port Checker Tool?
The Port Checker Tool allows you to check if a specific port on a server or device is open or closed. This tool is essential for network troubleshooting, security testing, and ensuring proper server configurations.
How It Works
- Enter the server's IP address or domain name.
- Enter the port number you want to check.
- Click the "Check" button to see if the port is open or closed.
Key Features
- Check Any Port: Test if specific ports are accessible.
- Server Configuration: Ensure that the required ports are open for your application.
- Network Security: Verify that unnecessary or vulnerable ports are closed.
Common Ports and Their Uses
| Port | Protocol | Description |
|---|---|---|
| 20 | FTP | File Transfer Protocol (Data Transfer). |
| 21 | FTP | File Transfer Protocol (Command Control). |
| 22 | SSH | Secure Shell, used for secure remote login. |
| 23 | Telnet | Unencrypted text communication. |
| 25 | SMTP | Simple Mail Transfer Protocol, used for sending emails. |
| 53 | DNS | Domain Name System, used for resolving domain names to IP addresses. |
| 67 | DHCP | Dynamic Host Configuration Protocol (Server). |
| 68 | DHCP | Dynamic Host Configuration Protocol (Client). |
| 80 | HTTP | Hypertext Transfer Protocol, used for standard web traffic. |
| 110 | POP3 | Post Office Protocol v3, used for email retrieval. |
| 123 | NTP | Network Time Protocol, used for time synchronization. |
| 137 | NetBIOS | Name Service. |
| 138 | NetBIOS | Datagram Service. |
| 139 | NetBIOS | Session Service. |
| 143 | IMAP | Internet Message Access Protocol, used for email retrieval. |
| 161 | SNMP | Simple Network Management Protocol. |
| 194 | IRC | Internet Relay Chat. |
| 443 | HTTPS | Secure Hypertext Transfer Protocol, used for encrypted web traffic. |
| 445 | SMB | Server Message Block, used for file sharing. |
| 465 | SMTPS | Secure SMTP, used for secure email transmission. |
| 514 | Syslog | System Logging. |
| 587 | SMTP Submission | Secure Email Sending. |
| 631 | IPP | Internet Printing Protocol. |
| 993 | IMAPS | Secure IMAP, used for encrypted email retrieval. |
| 995 | POP3S | Secure POP3, used for encrypted email retrieval. |
| 1080 | SOCKS Proxy | Proxy server protocol. |
| 1433 | Microsoft SQL Server | SQL Server database service. |
| 1434 | Microsoft SQL Monitor | Monitoring for SQL Server. |
| 1521 | Oracle Database | Oracle database service. |
| 1723 | PPTP | Point-to-Point Tunneling Protocol. |
| 3306 | MySQL | MySQL database service. |
| 3389 | RDP | Remote Desktop Protocol, used for remote desktop connections. |
| 5432 | PostgreSQL | PostgreSQL database service. |
| 5900 | VNC | Virtual Network Computing, used for remote desktop sharing. |
| 6379 | Redis | In-memory data structure store. |
| 8080 | HTTP Proxy | Alternative HTTP port, often used for proxy servers. |
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