Which Ports Are Usually Open By Default?
- 20 – FTP (File Transfer Protocol)
- 22 – Secure Shell (SSH)
- 25 – Simple Mail Transfer Protocol (SMTP)
- 53 – Domain Name System (DNS)
- 80 – Hypertext Transfer Protocol (HTTP)
- 110 – Post Office Protocol (POP3)
- 143 – Internet Message Access Protocol (IMAP)
- 443 – HTTP Secure (HTTPS)
How can I check which ports are open?
Just follow these steps and you'll be good to go:
- Open the Start menu, type “Command Prompt ” and select Run as administrator.
- Now, type “netstat -ab” and hit Enter.
- Wait for the results to load, port names will be listed next to the local IP address.
What ports are open to the Internet?
A number of ports are safe to open such as the ones used for Internet access, email and FTP file transfers. Common port numbers that typically may be open include 21, 25, 80, 110, 139 and 8080. By default, these port numbers are usually active and open in most routers.
