Definition: The term 'stunnel4.conf' refers to a configuration file for tunneling over IPv4 networks. It's used to specify details about the protocol, interface, and other components needed to route traffic through an existing network or create new connections. In context of the Bible: The .stunnel4.conf is a detail in the documentation that describes how to set up a tunnel connection using the network protocol "STUN" (short for Stun). This document likely discusses the specifics of connecting between two hosts, including configuring the protocol, interface, and other settings to create or establish secure tunnel connections.