Overview
Before visitors receive content, they need to find the correct entry point. Review DNS, certificates and CDN configuration as one integration plan so individual correct settings form a working chain.
This is a DNS integration and evaluation guide. It does not announce standalone authoritative DNS, programmable records or custom nameserver products. Confirm available hosting and routing features individually.
Inventory records and their responsibilities
Websites, email, validation records and delegated subdomains serve different purposes. Change only relevant records when connecting a CDN so website work does not disrupt another service.
| Record or setting | Check |
|---|---|
| Website resolution | Target address, alias chain and current hosting restrictions |
| Email and validation | Existing records required by other services |
| TTL | Cache duration and the change window |
| Certificates | Requested names, certificate coverage and validation |
Make DNS changes verifiable and reversible
Resolver caches do not update everywhere at the same moment. Plan the change window and keep old and new entry points working during the transition.
- Record the original DNS and application settings, with clear owners for changes and verification.
- Validate certificates, content and permissions at the destination before switching.
- Observe resolution from multiple real networks rather than only a local cache.
- Allow for cached answers during rollback instead of assuming an instant reversal.
Distinguish DNS routing from request routing
DNS decisions are affected by resolver caching, while connection or application routing happens later. Define the boundaries for failure detection, propagation and recovery when choosing an approach.
Health signals
Use checks that reflect application health rather than relying only on an open port.
Failover
Verify the alternate entry point completely and exercise the transition while some clients still hold old answers.
Access management
Limit who can change records, retain change history and review access regularly.