UDP relay with blowfish encryption
Nicepipe is netcat's p2p buddy
Transparent non-intrusive TLS SNI proxy
GRE Over UDP tunnel (works on both BSD and Linux)
Tunnel TCP connections through ICMP.
3proxy - tiny free proxy server
A mirror of VTUN, with some changes
支持天翼拨号的pppd - 旧版
Various command-line tools, mostly for Linux
Software program that emulates a PPP, SLIP, or CSLIP connection to the Internet via a shell account
A Dead Simple VPN.
The only tool/technique to punch holes through firewalls/NATs where multiple clients & server can...
Simple UDP tun/tap-based tunnel with mcrypt encryption. Also some more AF_PACKET and tun/tap rela...
Redirect traffic to SOCKS5 server with iptables, epoll based, single threaded.
Multi-path Tunnel
A light weight socks5 proxy server implemented in c using epoll and nonblocking socket.