wxlg1117/tcpprox

Simple TCP proxy. Allows you to intercept/inspect TCP traffic.

tcpprox

A simple TCP proxy written in GO. Allows for proxy-ing TCP connections as well as TLS wrapped TCP connections.

Can be run simply from the command-line using arguments. Or supplying a config file. Or both. The command line arguments have precidence and override the config file

Usage

To create a TLS proxy using the supplied config file:

tcpprox -s -c config.json -r 172.16.0.12:4550

To create a normal TCP proxy, no config file:

tcpprox -l 0.0.0.0 -p 8081 -r 172.16.0.12:8081

To specify a custom certificate to use (PEM format) you can use the -cert option:

tcpprox -s -c config.json -cert server

Where server is the prefix to server.pem and server.key (I'm lazy...) To generate valid certificate and key:

openssl genrsa -out server.key 2048 openssl req -new -x509 -key server.key -out server.pem -days 3650 To convert the certificate to DER format:

openssl x509 -in server.pem -out server.crt -outform der