OpenBullet (v1.2.2) is an open-source tool designed to create a secure tunnel using OpenVPN configurations ( .ovpn files) to facilitate anonymous and encrypted network traffic routing. It is commonly used to enable secure remote access to devices (e.g., Raspberry Pi) or to bypass network restrictions, provided users comply with legal guidelines and terms of service for their network providers.

OpenBullet 1.2.2 is a late-stage release of the original OpenBullet (OB1) architecture. Released before the major architectural shift to OpenBullet 2 (which uses a plugin system), version 1.2.2 is often remembered as the most stable and feature-complete version of the legacy build. It was designed as a web testing suite utilizing a .NET framework (specifically requiring .NET Framework 4.7.2), intended for developers to test the security of their web applications. openbullet 1.2.2