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Service Up, Ports Open, Certs Valid, VPN Dead for 4 Hours: Tailscale Took Over DNS and Left the Proxy Box With No Upstream
A Los Angeles VPS running sing-box (VLESS-REALITY + Hysteria2) lost its VPN the day after Tailscale was installed. systemctl, ports and certificates were all fine. The root cause was in /etc/resolv.conf: Tailscale manages DNS by default, the tailnet had no global nameservers, and when dhclient renewed its lease tailscaled read an empty resolv.conf and dropped its upstream list. From then on every public domain got SERVFAIL, and the REALITY handshake could not even resolve www.apple.com. Full timeline, the evidence for each step, three fixes, and the rules we added to CLAUDE.md so an AI assistant (Claude Code) does not walk into this again.
claude-codetroubleshooting+8
pitfallsSep 17, 20266 min
127
Turn a Home Mac mini Into an Always-On Claude Code Workstation: claudecodeui + SSH Reverse Tunnel, Take Over Sessions From Any Browser
A Mac mini at home runs Claude Code around the clock — but how do you take over a session from a browser when you're away? This is a real setup that has been live for a week and in daily use: claudecodeui as the web UI (chosen over the official web version, ttyd, and code-server), an SSH reverse tunnel pushing it to a VPS, and nginx adding TLS plus login rate limiting to turn it into an ordinary URL. Includes full configs, real operating numbers (five days of tunnel uptime with zero drops, 170MB RSS), a <synthetic> placeholder bug hit and fixed within the first week, and an honest for-and-against on why not Tailscale.
claude-codeclaude-code-lab+7
claudeAug 29, 202612 min
297The SQLite Bug That Hid for 16 Years: How Tailscale Found It
Nineteen database corruptions in six months, all traced to a data race that had been sitting in SQLite for roughly 16 years. Here are 10 lessons from Tailscale's investigation into the WAL-Reset bug.
debuggingsqlite+5
ai-tutorialsAug 13, 202613 min
243