Campagnol is a small Layer 3 tunneling VPN over UDP/DTLS. One of its design objective was to use some NAT traversal technique. So it uses UDP hole punching to establish the new connections and therefore uses a single UDP socket. I'll try to explain how Campagnol handles this multiple peers per socket issue.
Campagnol VPN Campagnol is a decentralized VPN over UDP tunneling. It uses Express Nat The main goal of expressnat is to provide a solution for Webtunnel Webtunnel is an HTTP tunnel with some unique features: it Brekeke SIP Server for Linux Brekeke SIP Server provides a SIP-based communication n2n设成服务 N2N VPN服务器的搭建基础教程 - Linux - 服务器之家 另附：Campagnol VPN 使用的一些感受，没有进行详细测试. Campagnol 是一个分布式基于IP的 VPN程序，可以无配置的直接透过防火墙和 NATs，使用的是传输层的 UDP. 原理是和N2N一样的，只不过他是使用的密钥方式管理。 使用方法： 安装 签发CA和密钥 运行服务端和客户端 Free Nat Downloads - Linux Nat linux software free downloads and reviews at WinSite. Free Linux Nat Shareware and Freeware.
Nat hole punching
Best vpn software downloads [freeware] Campagnol is a distributed IP-based VPN software able to open new connections through NATs or firewalls without any configuration. It uses UDP for the transport layer and utilizes tunneling and encryption (with DTLS) and the UDP hole punching NAT traversal technique. The … IMTCLOUD :: IMT CLOUD
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