Add a new test that validates VPN namespace isolation for Nixarr services.
The test uses a 3-VM topology to ensure that transmission traffic is properly
confined to the VPN tunnel and includes:
- IPv4 and IPv6 traffic routing verification
- DNS leak detection using tcpdump and static DNS entries
- Traffic leak prevention when VPN fails
- Port forwarding from external clients
- Service recovery after VPN reconnection
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
Alexandra Østermark