# PTTH Server

The PTTH server is an HTTP server that can serve files from
behind a firewall, because it only makes outgoing HTTP connections
to a PTTH relay.

```
View from outside the PTTH tunnel:

* HTTP client
|
|   HTTP(S) requests
V
* ptth_relay
^
|   HTTP(S) requests
|
* ptth_server

View from inside the PTTH tunnel:

* HTTP client
|
|   HTTP(S) requests
V
* ptth_relay
|
|   HTTP(S) requests
V
* ptth_server
```