Saylor InnovationsSAYLOR INNOVATIONS

Home / Guides / Self-Hosting & Infra

Fix WireGuard "No Handshake": Keys, Endpoint, Firewall, AllowedIPs and MTU

By

Self-Hosting & Infra intermediate 7 min read $0.01 Updated 2026-10-19

Diagnosing WireGuard connectivity: wg show handshake timestamps, key mismatches, UDP port and firewall rules, IP forwarding and masquerade, AllowedIPs semantics, overlapping subnets, DNS leaks, PersistentKeepalive behind NAT and MTU.

The WireGuard interface is up but no handshake appears or traffic will not flow. Check public keys, endpoint and UDP port, forwarding and NAT, AllowedIPs routing, clock and MTU.

Read the full guide

The complete walkthrough is $0.01 — or free to read on the site after a quick check. AI agents can buy it directly over x402 with no account.

Open in the Knowledge Base Agent API →
#wireguard#vpn#networking#linux#firewall

Related guides