GoVPN is simple free software virtual private network daemon, aimed to be reviewable, secure, DPI/censorship-resistant, written on Go.
It uses fast strong passphrase authenticated key agreement protocol with augmented zero-knowledge mutual peers authentication (PAKE DH A-EKE). Encrypted, authenticated data transport that hides message's length and timestamps. Optional encryptionless mode, that still preserves data confidentiality. Perfect forward secrecy property. Resistance to: offline dictionary attacks, replay attacks, client's passphrases compromising and dictionary attacks on the server side. Built-in heartbeating, rehandshaking, real-time statistics. Ability to work through UDP, TCP and HTTP proxies. IPv4/IPv6-compatibility. GNU/Linux and FreeBSD support.