TCP over HTTP

This project aims to provide an easy-to-setup TCP forwarding solution:

|--------|              |--------|                     |--------|              | -------|
|        |              | Client |                     | Server |              |        |
| Client | -- TCP xx -- |        | -- HTTP 80 / 443 -- |        | -- TCP xx -- | Server |
|        |              |  Relay |                     |  Relay |              |        |
|--------|              |--------|                     |--------|              |--------|

This project can be used especially to bypass firewalls that blocks traffics from ports others than the HTTP / HTTPS ports.

Authentication

The client can authenticate agains the server relays through two different means:

• Using a token
• Using a client TLS certificate. In this case, the server relay must act as a HTTPS server, and you must provide the server the required certificates / key files in PEM format. It is also possible to provide the server a CRL file.

Binaries

This repository contains two binaries:

• tpc_relay_server: The server relay. In case of token authentication, it can be put behind a reverse proxy.
• tcp_relay_client: The client relay

A single server - client relay pair can relay multiple ports simultaneously from the same machine.