https://www.e7coding.com/en/tags/derp/Recent content in DERP on E7CodingHugoenJoyJoyTue, 16 Jun 2026 12:00:00 +0800https://www.e7coding.com/en/posts/self-hosted-derp/Tue, 16 Jun 2026 12:00:00 +0800Joyhttps://www.e7coding.com/en/posts/self-hosted-derp/<blockquote> <p>Background: I self-hosted a private network with Headscale. Most devices can connect directly through WireGuard P2P, but several machines behind symmetric NAT or carrier-grade NAT always failed NAT traversal and had to use a relay. Official Tailscale DERP relays are overseas for me, often starting at 100ms+. So I built a domestic DERP relay and brought latency down to around <strong>20ms</strong>. This post records the full process and three pitfalls.</p>