GoVPN 是采用 Go 语言开发的简单安全的免费 VPN 守护进程。
GoVPN 4.0 发布，此版本相比 3.5 版本，改进如下：
* Handshake 信息长度已经隐藏起来了
* 在服务端处理并行客户
* 更高的性能
* 单个 JSON 文件服务器配置
相比 3.0 版本，值得关注的改进：
* Handshake message's payload is zero-knowledged (Elligator public keys
encoding) and noised.
* Much higher performance. 2.x version on my single Core i5 notebook's
CPU core gave ~100Mbps, 3.x version gave ~300-350Mbps. 4.0 version with
Go 1.5, UDP transport, under FreeBSD give 786Mbps. Moreover server
process clients in parallel.
* Ability to work over TCP transport.
* Ability to use HTTP proxies and act as an HTTP proxy (CONNECT method).
* Ability to use EGD-compatible PRNGs. You are not forced to use
OS-provided /dev/random source anymore.
* Single JSON file server configuration.
* GoVPN is available as a FreeBSD port and AUR package:
其他内容请看：
http://www.freshports.org/security/govpn/
https://aur.archlinux.org/packages/govpn/
软件详情：http://lists.cypherpunks.ru/pipermail/govpn-devel/2015-September/000043.html
来自:开源中国社区
