SoftEther: New Open Source VPN Package

Become open source at Jan 4, 2014

SSL-VPN Tunneling on HTTPS

Ethernet-bridging (L2) and IP-routing (L3) over VPN

Embedded dynamic-DNS and NAT-traversal

6 major VPN protocols:

    OpenVPN
    IPsec
    L2TP
    MS-SSTP
    L2TP V3
    EtherIP

 

VPN over ICMP or DNS feature

 

https://www.softether.org/