Defining a Custom Port for Rsnapshot Backup

Rsnapshot is a powerful filesystem snapshot utility for making backups of local and remote systems. It leverages rsync and hard links to create efficient and space-saving backups. By default, rsnapshot uses SSH to connect to remote systems, which typically operates over port 22. However, there are scenarios where you might need to define a custom port for SSH connections, such as when the remote server is configured to use a non-standard port for security reasons.