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. |