Troubleshooting Zero Trust Tunneling for Edge Cloud (9236)

Technical Overview

Zero Trust Tunneling (ZTT) on Votion Cloud's Edge BareMetal platform enforces cryptographic identity verification at every hop. The 9236 release introduces a hardened WireGuard‑based data plane with integrated eBPF policy enforcement, eliminating implicit trust between edge nodes and central controllers.

Key Architecture Changes in 9236

• Kernel‑level tunnel endpoints – each bare‑metal host runs a dedicated wg‑edge kernel module pinned to isolated CPU cores (via cset) to avoid noisy‑neighbor interference.
• eBPF‑driven attestation – a BPF program validates TPM‑derived measurements before allowing packet encapsulation.
• Dynamic MTU negotiation – the control plane now advertises per‑link MTU via gRPC, preventing fragmentation on heterogeneous last‑mile links.

Common Failure Modes

1. Handshake timeout – usually caused by mismatched PersistentKeepalive intervals or firewall rules dropping UDP 51820.
2. Policy denial – eBPF map zt_policy missing the peer's identity hash; verify bpftool map dump output.
3. MTU blackhole – ICMP Packet‑Too‑Big blocked; enable net.ipv4.icmp_echo_ignore_all=0 on the host.

Below you will find live telemetry, a reproducible code sandbox, cost modeling, a CLI builder for rapid tunnel provisioning, and an interactive network topology visualizer.