Articles & Guides
Useful resources for web developers and system administrators
Found 46 · DNS · Reset
DNS
DNS TTL Values: Best Practice for A, MX, TXT and NS Records
What DNS TTL to set: typical values per record type, how TTL affects propagation and caching, and why to lower it to 300 seconds before a migration.
DNS
DNS Failover: Automatic Traffic Switching on Outage
Learn how DNS failover works, how to configure automatic traffic switching, and best practices for achieving high availability with DNS.
DNS
DNS over HTTPS (DoH): Privacy, Security, and How It Works
Learn how DNS over HTTPS encrypts DNS queries, improves privacy, prevents manipulation, and what it means for network security and monitoring.
DNS
DNS Performance: Optimizing Resolution Speed
How to speed up DNS resolution: choosing DNS providers, TTL settings, prefetch, minimizing lookups. DNS impact on website speed.
DNS
DNSSEC: How It Works, How to Enable and Safely Disable
How DNSSEC and the chain of trust work, how to sign a zone and publish the DS at your registrar, how to verify it with dig, and how to disable it without breaking the domain.
DNS
Why Your Site Doesn't Work After a DNS Change and How Long
Why your site doesn't work after a DNS change, how long the update really takes and how to speed it up. TTL, resolver caches, dig checks and common migration mistakes.