QPortForwarder

Simple TCP port forwarding application.

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What is it good for?

It creates forwarding handler between local device and some target service.

For example there is some web server running on some.domain.example:80 and we want to traverse communication through our host on port 8888.

Start the program and start forwarding with following parameters: 127.0.0.1 8888 some.domain.example 80

This will open connection on port 8888 of our source device on all interfaces (0.0.0.0 is used when no exact ip is specified) , and will forward some.domain.example:80.

Anyone in our network can now access some.domain.example:80 by accessing our ip and port 8888.

Application remembers its settings in session.json file. It will autosave when the application exists.

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Minimal requirements

JRE 8

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Console usage

Application can be run even from command line interface. In current state, only one forwarding rule can be run at a time.

Start application from command line with standard java -jar QPortForwarder.jar and add parameters.

Parameters description.

1. forward
   1. Forwarding command with following parameters options
      1. localPort targetPort
         1. Creates port forwarding handler between 0.0.0.0:port and localhost:port
      2. localPort targetIp targetPort
         1. Creates port forwarding handler between 0.0.0.0:port and targetIp:port
      3. localIp localPort targetIp targetPort
         1. Creates port forwarding handler from localIp:port to target targetIp:port
         2. This is handy for example when local pc has multiple network interfaces and we need to provide forwarding between them.
   2. Examples:
      1. forward 8888 8080 will create forwarding handler between 0.0.0.0:8888 and 127.0.0.1:8080
      2. forward 8888 192.168.10.10 8080 will create forwarding handler from 0.0.0.0:8888 to ip 192.168.10.10:8080
      3. forward 192.168.10.5 8888 10.0.0.5 8080 will create forwarding handler from local ip & port 192.168.10.5:8080 to 10.0.0.5:8888
2. help
   1. Prints description of all available commands