A practical workaround for Telekom's congested Cloudflare peering using Tailscale subnet routing. By advertising Cloudflare's IP ranges through a €1/month IONOS VPS (which has direct peering with Cloudflare at BCIX Berlin), connection times dropped from 11+ seconds to under 400ms. The setup uses NixOS on both the home router and VPS, with Tailscale handling route advertisement and NAT automatically. Caveats include ~5ms added latency, ~500 Mbps VPS bandwidth cap, and the VPS becoming a single point of failure for Cloudflare access.
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