Port Scanner

Ports to be scanned by default

• 21 - File Transfer Protocol (FTP) Control
• 22 - Secure Shell (SSH)
• 25 - Simple Mail Transfer Protocol (SMTP)
• 80 - Hypertext Transfer Protocol (HTTP)
• 109 - Post Office Protocol Version 2 (POP2)
• 110 - Post Office Protocol Version 3 (POP3)
• 115 - Simple File Transfer Protocol (SFTP)
• 143 - Internet Message Access Protocol (IMAP)
• 554 - Real Time Streaming Protocol (RTSP)
• 873 - rsync File Synchronization Protocol
• 990 - FTP Secure (FTPS)
• 993 - IMAP over SSL (IMAPS)
• 995 - POP3 over SSL (POP3S)
• 3306 - MySQL Database
• 5432 - PostgreSQL Database

Get Started with Port Scanner

To check if the list of ports is open in a specific IP address or hostname. You need to enter the IP Address or hostname. The port number is optional. If you enter the list of port numbers separated by a comma, it will check the list of port numbers else it will check the list of default port numbers. Once you click the "Check Port" button, it will scan the list of port numbers on your server. After completion, you will see a message about whether the list ports for a device are open or closed. If you have to check your router for port forwarding, click on the "Use Current IP" button which will automatically enter your Public IP Address in the IP Address/hostname section then enter a list of port numbers in Port Numbers field.

What is a Port Scanner?

A port Scanner is a tool to check if your server ports are open 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 network then you need to open a port (HTTP - 80, SSL - 443). In that condition, you can use our port scanner to check if your router ports are open. This is similar to our other tool port checker. This will check multiple ports at once.

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 or 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

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.