Port Checker
A Port Checker is used to check if the port is open during server setup and verify if port forwarding is open on your router.
Get Started with Port Checker
To check if the port is open in a specific IP address. You need to enter the IP Address/hostname of your device, enter the port number, and click on the "Check Port" button. Once you click on the button, you will get a message about whether the specific port for a device is open or closed. If you want to check on your router for port forwarding you can click on the "Use Current IP" button which will automatically enter your Public IP Address/hostname in the IP Address/hostname field and you need to enter a port number.
What is a Port Checker?
A port checker is a tool to check if your server port (SSH, SSL, FTP) is open while setting up your server by yourself and to check if port forwarding is enabled on your router. Generally, your ISP will block the port using the router's firewall. For some reason, if you want to host your server from your home then you need to open a port (HTTP - 80, SSL - 443). In that condition, you can use our port checker to check if your router port is open. You can also use the port checker if you host games like Minecraft and check if the server port (25565) is open so that your friends can connect to your server.
Port Number
The Port Number is maintained by the Internet Assigned Numbers Authority (IANA). It assigns the specific port for specific use eg. Port 80 is used for HTTP, and Port 22 is used for SSH.
Port Number Range
Port numbers range from 0 to 65535
- Ports from 0 to 1023 are well-known system ports.
- 1024-49151 are registered ports. They are assigned by IANA for specific services.
- 49152-65535 are dynamic or private ports and cannot be registered with IANA. They are used for private services temporarily.
If you need detailed information about the port you can visit Wikipedia
Most Well Known Ports
- 21 - FTP (File Transfer Protocol)
- 22 - SSH (Secure Shell)
- 23 - Telnet Protocol
- 25 - SMTP (Simple Mail Transfer Protocol)
- 53 - DNS (Domain Name System)
- 80 - HTTP (Hypertext Transfer Protocol)
- 110 - POP3 (Post Office Protocol, version 3)
- 123 - NTP (Network Time Protocol)
- 143 - IMAP (Internet Message Access Protocol)
- 194 - IRC (Internet Relay Chat)
- 443 - HTTPS (Hypertext Transfer Protocol Secure)
- 445 - SMB (Server Message Block)
- 554 - RTSP (Real Time Stream Control Protocol)
- 873 - RSYNC (Remote Synchronizing File Transfer Services)
- 3306 - MySQL (Database Management System)
- 3389 - RDP (Remote Desktop Protocol)
- 5432 - PostgreSQL (Relational Database Management System)
- 6379 - Redis (Remote Dictionary Service)
- 8333 - Bitcoin (Cryptocurrency)
- 11211 - Memcached (Memory Caching System)
- 25565 - Minecraft Game
What is Port Forwarding?
Port forwarding is redirecting network traffic from a specific port on your router to a device that is connected to your router within the private network. For eg: If you want to access your personal computer at home from your office using SSH. You need to open port 22 on your router.
Why the ISP block port?
In residential areas, ISPs block ports to combat spam and virus attacks. For eg. Port 80, the default port for HTTP is blocked by ISP so that outsiders cannot run on your web server.
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