TORch is a solution for creating an SSH-via-Tor backdoor on a remote device as a means of fallback remote management and initial headless device configuration.
## Description
Since Tor traffic easily crosses NAT boundries, this is a nice solution for
* fallback connection to remote devices located on other LANs in the event that the network configuration on the remote side changes and the primary connection / VPN fails
* the initial discovery and connection to a headless device like a Raspberry Pi on a local network which is configured via DHCP
A TORch solution consists of 3 processes:
*`torch-agent` - Installed on remote machine; responsible for creating Tor hidden service and broadcasting the onion hostname an MQTT broker
* MQTT broker - Any MQTT broker, reachable via IPv4 or Tor, through TLS or insecure communications
*`torch-subscriber` - Listens for and handles onion hostname publications
## Installation of TORch Agent (Ubuntu)
Copy the files to the target device
*`install-ubuntu2004.sh`
*`torch-agent.py`
*`torch.conf`
*`torch.service`
Run the installation script:
```bash
vagrant@ubuntu2004:~$ ./install-ubuntu2004.sh
```
This will create a local user `torch` and install the TORch agent as a Systemd service named `torch`
## Configuration
The TORch agent will look for a `torch.conf` configuration in the configuration directory.
The configuation directory can be specified by
* The `TORCH_CONFIG_DIR` environment variable
* Using the `--config-dir` commandline option
* Default: `/etc/torch`
A fully configured example can be found [here](example/README.md)
See the sample [`torch.conf`](torch.conf) file for additional configuration options and details
