By default, SSH listens on port 22. Changing the default SSH port adds an extra layer of security to your server by reducing the risk of automated attacks. Instead of changing the port is much simpler and secure to configure your firewall to allow access to port 22 only from specific hosts.
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This tutorial explains how to change the default SSH port in Linux. We will also show you how to configure your firewall to allow access to the new SSH port….
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