I built a chained VPN lab to support multi-user traffic isolation using only raw Linux tools.
Each user gets:
- A WireGuard tunnel
- A dedicated namespace (wg-$user) bridged via veth
- NAT and routing table override
- A second namespace (ovpn-$user) running OpenVPN
- Final egress through tun1
The entire setup is controlled with bash scripts and PostgreSQL — no Docker, no containers, no Python, just raw netns, iptables, ip rule and shell.
Built for GDPR-compliant VPN infra with real isolation per collaborator.
Code and README:
https://github.com/darksunstealth/multi-vps-routing
Would love feedback — this was one of the most complex and satisfying systems I’ve built in pure Linux.
