This guide demonstrated how to build a defense-in-depth sandbox architecture using open-source technologies. By combining gVisor for kernel isolation, 9P for filesystem control, and JWT-based proxy for network security, you create multiple independent barriers that protect your infrastructure from untrusted code execution.
- Layer Your Defenses: Multiple security layers reduce risk
- Use gVisor: Isolates untrusted code from the host kernel
- Control Network Access: JWT-based proxy limits outbound connections
- Limit Resources: Prevents resource exhaustion attacks
- Monitor Everything: Detect and respond to incidents early
- gVisor Documentation: https://gvisor.dev/docs/
- Envoy Proxy Docs: https://www.envoyproxy.io/docs/
- Container Security: https://kubernetes.io/docs/concepts/security/
- JWT Standards: https://tools.ietf.org/html/rfc8725
Security knowledge should be shared responsibly. If you find improvements or identify new attack vectors, report them through proper channels so they can be addressed before public disclosure.
This guide is based on security analysis. For updates and improvements:
- Report issues via your organization's security channel
- Submit improvements through proper review process
- Keep security findings confidential until patched