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# Platforms and Networking
This guide covers platform-specific notes and Docker networking behavior.
## Windows
Shannon Lite on Windows is supported through WSL2. Native Windows, including Git Bash, is not supported.
### Ensure WSL2
```powershell
wsl --install
wsl --set-default-version 2
# Check installed distros.
wsl --list --verbose
# If you do not have a distro, install one.
wsl --list --online
wsl --install Ubuntu-24.04
# If your distro shows VERSION 1, convert it to WSL2.
wsl --set-version <distro-name> 2
```
Install Docker Desktop on Windows and enable the WSL2 backend under **Settings > General > Use the WSL 2 based engine**.
Run Shannon Lite inside WSL:
```bash
npx @keygraph/shannon setup
npx @keygraph/shannon start -u https://your-app.com -r /path/to/your-repo
```
Source-build equivalent:
```bash
git clone https://github.com/KeygraphHQ/shannon.git
cd shannon
cp .env.example .env
./shannon start -u https://your-app.com -r /path/to/your-repo
```
To access the Temporal Web UI, run `ip addr` inside WSL to find your WSL IP address, then navigate to `http://<wsl-ip>:8233` in your Windows browser.
Windows Defender may flag exploit code in reports as false positives. Add an exclusion for the Shannon Lite directory or use Docker/WSL2 isolation.
## Linux
Linux works with native Docker. Depending on your Docker setup, you may need `sudo`. If output files have permission issues, ensure your user has access to the Docker socket and workspace directory.
## macOS
macOS works with Docker Desktop installed.
## Testing Local Applications
Docker containers cannot reach `localhost` on your host machine. Use `host.docker.internal` instead:
```bash
npx @keygraph/shannon start -u http://host.docker.internal:3000 -r /path/to/repo
```
Source-build equivalent:
```bash
./shannon start -u http://host.docker.internal:3000 -r /path/to/repo
```
## Custom Hostnames
If your local stack uses custom hostnames mapped in `/etc/hosts`, Shannon Lite forwards those entries into the worker container at scan start.
To disable forwarding:
```bash
export SHANNON_FORWARD_HOSTS=false
```
In source-build mode, you can also add this to `.env`:
```bash
SHANNON_FORWARD_HOSTS=false
```