WireGuard is a communication protocol and free and open-source software that implements encrypted virtual private networks (VPNs).

However, when exclusively carrying legacy IPv4 traffic, a higher MTU of 1440 bytes for the WireGuard interface suffices.

This approach ensures consistency and facilitates a smoother transition to enabling IPv6 for the WireGuard peers and interfaces in the future.

[citation needed] Excluding such complex features from the minimal core codebase improves its stability and security.

A review by Ars Technica found that WireGuard was easy to set up and use, used strong ciphers, and had a minimal codebase that provided for a small attack surface.

[19] Implementations of the WireGuard protocol include: Early snapshots of the code base exist from 30 June 2016.

[28] The logo is inspired by a stone engraving of the mythological Python that Jason Donenfeld saw while visiting a museum in Delphi.

[38] On 23 November 2020, Jason A. Donenfeld released an update of the Windows package improving installation, stability, ARM support, and enterprise features.

[25] On 19 January 2021, WireGuard support was added for preview in pfSense Community Edition (CE) 2.5.0 development snapshots.