Frequelty Asked Question to Change the Default SSH Port in Linux
1. How can I change the default SSH port in Linux?
To change the default SSH port in Linux, you can modify the SSH daemon configuration file located at `
/etc/ssh/sshd_config`. Look for the line containing “Port” and change the port number to your desired value. After making the change, restart the SSH service using `sudo service ssh restart`.
2. What are the security implications of changing the SSH port?
Changing the default SSH port adds a layer of security by making it less predictable for potential attackers. However, it’s not a foolproof security measure, and it’s crucial to implement other security practices like using key-based authentication, disabling root login, and keeping the system and SSH software up to date.
3. How do I access a Linux server with a custom SSH port?
To access a Linux server with a custom SSH port, include the port number in the SSH command. For example, if you changed the port to 2222, use the command: `
ssh user@your_server_ip -p 2222`. Ensure that the firewall on both the client and server allows traffic on the custom port.
4. Can I use any port number for SSH?
In theory, you can use any available port for SSH. However, it’s recommended to choose a port number between 1024 and 49151 that is not commonly used by other services. Ports below 1024 are considered well-known ports, and using them for SSH may require additional permissions.
5. What should I do if I’m locked out after changing the SSH port?
If you’re unable to access your server after changing the SSH port, check if the port is open in the firewall and if the SSH service is running. If you have physical or console access to the server, you can revert the changes in the SSH configuration file. Alternatively, if you have a backup of the configuration file, restore it to regain access.
How to change the default SSH port in Linux
SSH (Secure Shell) is a network protocol used to securely connect to the remote server where the data between the server and client is transferred in an encrypted format.
In the world of Linux system administration and security, one essential practice is changing the default SSH port. This article will guide you through the process of enhancing your server’s security by altering the default SSH port, providing you with valuable skills to protect your system from potential threats and unauthorized access. Join us in this informative exploration of “How to Change the Default SSH Port in Linux.”