nsupdate.info exposes dynamic DNS update workflows. Hardening should focus on token safety and controlled update scope.
¶ Authentication and Token Safety
- Use strong user authentication and MFA where supported.
- Restrict per-host/per-zone update tokens.
- Rotate update credentials periodically.
- Use TSIG or provider-authenticated update channels.
- Restrict update endpoints to required clients.
- Validate and log every update request.
- Deploy behind reverse proxy with TLS.
- Restrict admin UI to management networks.
- Rate-limit update endpoints to reduce abuse.