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PortFusion has been developed at the University of Heidelberg for the Department of Political Science (IPW) to establish high-throughput links to gateway servers at the Interdisciplinary Center for Scientific Computing – circumventing tedious paper work demands (just to open IPW servers to the public) and continued interference of lesser network admins from the general computing center of the same university.

Since its launch, it has enabled complete independence from network administrators from outside the two institutions and is now actively used for TCP traffic in a multitude of protocols (including HTTP, SPDY, S/FTP, RDP (remote desktop), VNC, and many WCF services) with 0 downtime.


Features
Hassle-free firewall penetration via tunneling
Protocol-neutral design (works with any TCP-based protocol)
Open-source (you can know exactly what it is doing)
Simplicity (< 500 lines of code: you can read it in minutes! Now try that with OpenVPN.)
High performance with multi-threading and asynchronous calls (check speed test videos below)
No installation process
Command line interface for easy launch-time configuration
Distributed, client / server architecture
Used in production for RDP, SSH, S/FTP, VNC and WCF services
Support for IPv6+4 (dual stack), IPv6-only and IPv4-only platforms
Interactive REPL