Reverse SSH tunneling is a crucial method for accessing remote machines, especially in decentralized and remote working environments highlighted by the COVID-19 pandemic. This technique is essential for overcoming firewall restrictions that typically reject incoming SSH connections when machines are behind NAT, allowing users to establish secure connections between local and remote systems. The text explains the fundamentals of SSH tunneling, including local, remote, and dynamic port forwarding, and discusses potential security risks associated with SSH tunneling, such as the misuse of SSH keys for unauthorized network access. It provides a comprehensive step-by-step guide for setting up reverse SSH tunneling on Linux-based systems, detailing the installation and configuration process of the SSH service and the creation of a reverse SSH tunnel. The guide emphasizes the importance of SSH key management and secure passphrase usage to enhance connection security and concludes by highlighting the utility of reverse SSH tunneling in accessing machines without a public IP address, with a nod to services like JFrog Connect that facilitate easy and secure remote device management.