Reverse-PortForward

This tool bypasses port restrictions of your router using some not-very-powerful server (those are really cheap.)

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How to set it up:

1. Buy some cheap server online, it will only need
   1. Enough disk space to run a java program About 1GB free after OS is installed)
   2. 500MB RAM or more
   3. Flexible port settings
   4. Not much CPU power
2. Download reverse-portfw.jar to it
3. Run the jar like this: java -jar reverse-portfw.jar server <port> <key>
4. Download reverse-portfw.jar to your destination server
5. Run it like this: java -jar reverse-portfw.jar client <ip of your bridge server> <port> <port to redirect (on local machine)> <key>
6. To restart, end BOTH processes (remote and on your local server) and restart them.

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Applications and special features:

• Minecraft servers tested and functional.
• HTTP tested and functional.
• Some third-party protocols tested and functional.
• This is not an HTTP-Proxy. It will work with any TCP protocol that isn't reliant on TCPNODELAY.
• No disconnects, even when the sockets stay open for hours.
• Fast
• Little ping increase in normal applications
• A 1ms waiting delay before sending is built in to reduce stress and increase efficiency by waiting for further data.

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Compiling from source

I will make this a gradle project at a later point. For now, all I can do is tell you that this uses tuddylib as library, and should be compiled with a java8 jdk.