What Port Do I Open for SSH Web Server?

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Larry Thompson

What Port Do I Open for SSH Web Server?

When it comes to setting up and securing a web server, one of the most important considerations is opening the correct ports. If you’re using Secure Shell (SSH) for remote administration of your server, it’s crucial to know which port to open to allow SSH connections. In this article, we’ll discuss the default SSH port and how to change it for added security.

Default SSH Port

The default port for SSH is 22. This means that by default, SSH listens for incoming connections on port 22. When you install an SSH server on your web server, it automatically opens this port to allow remote access.

Why Change the Default Port?

While the default SSH port is widely known and used, it’s also a prime Target for attackers. Most hackers will attempt to gain unauthorized access to a server by scanning commonly used ports such as 22. By changing the default port, you can make it more difficult for attackers to find your SSH service.

Choosing a New Port

If you decide to change the default SSH port, it’s important to choose a new port that is not already in use. You can select any available port between 1024 and 65535. It’s generally recommended to choose a high-numbered port that isn’t commonly associated with other services.

Updating the Configuration

To change the SSH port on your web server, you need to modify the configuration file of your SSH server software. The location of this file may vary depending on your operating system and distribution.

  • Linux (OpenSSH): Edit the /etc/ssh/sshd_config file and look for the line that specifies the Port. Change it to your desired port number and save the file.
  • Windows (OpenSSH): Edit the C:\ProgramData\ssh\sshd_config file and modify the Port setting accordingly.

Remember to restart your SSH service after making these changes for them to take effect.

Connecting to a Non-Default SSH Port

If you’ve changed the SSH port on your server, you need to specify the new port when connecting via SSH. Instead of using the default command:

$ ssh username@server-ip-address

You will need to use:

$ ssh -p new-port-number username@server-ip-address

Note:

If you’re using a firewall or network security group, make sure to allow incoming traffic on the new port you’ve chosen. Otherwise, you won’t be able to establish an SSH connection.

In Conclusion

Changing the default SSH port is a simple yet effective way to enhance the security of your web server. By selecting a different port and updating your server’s configuration, you can reduce the risk of unauthorized access attempts. However, it’s important to remember that security through obscurity is not foolproof, and additional security measures should be implemented alongside changing the default SSH port.

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