Matthew Macy was contracted to port WireGuard into FreeBSD's kernel for Netgate's routers, but his implementation contained numerous bugs and security issues that went largely unreviewed before being committed to FreeBSD 13.0. WireGuard founder Jason Donenfeld discovered the problems and, along with Kyle Evans and Matt Dunwoodie, replaced nearly all of Macy's code in an intensive week-long effort to fix critical issues before release.