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Dynamic DNS (DDNS)

Definition

Definition​

Dynamic DNS automatically updates DNS records when the underlying IP address changes. Clients or routers call the DDNS provider's API to keep the hostname pointing at the current IP.

Why it matters​

  • Home-hosted mirrors: If you run access relays on residential connections with changing IPs, DDNS keeps them reachable.
  • Testing: Quickly spin up temporary demo environments and share consistent hostnames with testers.
  • Workaround for static IP costs: Avoid paying ISPs for static IPs while still maintaining stable entry points.

Tips​

  1. Choose providers that support HTTPS updates and long random tokens.
  2. Set TTLs low (300s) so changes propagate fast when the IP flips.
  3. Combine DDNS with port forwarding and firewall rules so only Stripchat-related services are exposed.