, run the following command to open the port: sudo ufw allow 4422/tcp If you are using UFW, the default firewall in Ubuntu Adjusting Firewall #īefore changing the SFTP/SSH port, you’ll need to open the new port in your firewall. This example shows how to change the SFTP/SSH port to 4422, but you can choose any port of your liking. Although you can use a port within the 1-1024 range for the SSH service to avoid port allocation issues, it is recommended to choose a port above 1024. In Linux, port numbers below 1024 are reserved for well-known services and can only be bound to by root.
The following steps describe how to change the SSH Port on Linux machines. The best way to protect your server from attacks is to configure your firewall to allow access to port 22 only from trusted hosts and set up an SSH key-based authentication
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