SSH reverse tunneling is a powerful tool that enables secure remote access to systems or services that are behind firewalls or NATs (Network Address Translation). It is often used to provide external access to local systems and services without modifying the network’s security settings. In this detailed guide, we will break down SSH reverse tunneling, explain its applications, highlight security practices, and discuss alternatives. We will then discuss how Pinggy uses SSH reverse tunneling to share applications and services from localhost.