Flynet: a TCP/UDP tool that supports functions such as intranet penetration and port forwarding

flynet is a command line tool written in Golang language. For students who are engaged in cock-fighting, its intranet penetration and port forwarding are very practical. It supports both Windows and Linux systems.

Download page: https://github.com/asche910/flynet/releases

1. Installation of Flynet

Windows and Linux users can download the corresponding version directly from the Releases page. Other platforms can download the source code and compile it by themselves.

In Windows, use the command line to enter the corresponding directory, .\win-client.exe… or .\win-server.exe… The same in Linux, ./linux-server … or ./linux-client …

2. Intranet penetration

To put it simply, it means that the external network can access the machines in the internal network. What this tool does here is to map a port on the intranet to a port on the server, so that by accessing a port on the server, you can indirectly access the port on the intranet. Here’s how:

Server

server -M forward -L 8888 8080

Client

server -M forward -L 80 -S asche.top:8888

Also assuming that the server domain name is asche.top, what is accomplished is to map the client's port 80 to the server's port 8080, and the intermediate data transmission is completed by the server monitoring 8888. Then when we visit asche.top:8080, the content we see should be the content on port 80 of the client.

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