What is DNS cache TTL?

Posted on by Muna Meyer

What is DNS cache TTL?

DNS TTL (time to live) is a setting that tells the DNS resolver how long to cache a query before requesting a new one. For example, if the DNS TTL is set to 1800 seconds (30 mins), the resolver will have to regather the details around a website like varonis.com every 30 minutes.

How do I change DNS cache TTL?

Instructions

  1. Sign into the Account Center.
  2. Click the domain you want to edit.
  3. Under DNS & ZONE FILES, click on Edit DNS Zone File.
  4. Scroll down to the Additional Zone Actions tool, click on the Lower TTL button.
  5. Click the Raise TTL button to return the value back to the default 12 hours interval.

How do I find my TTL?

Find Out Time-To-Live (TTL) for a DNS record

  1. Open the terminal application on your Linux/macOS/Unix desktop.
  2. Type dig TYPE DomainNameHere NS1-AUTHNAME-SERVER-HERE and note down TTL from the answer section.

Is high TTL good?

The higher the TTL, the less frequently caching name servers need to query authoritative name servers. A higher TTL reduces the perceived latency of a site and decreases the dependency on the authoritative name servers. The lower the TTL, the sooner the cached record expires.

What is a TTL of 3600?

The Basics. Time To Live, or TTL for short, is the sort of expiration date that is put on a DNS record. With a TTL of 3600 seconds, or 1 hour, that means that as a recursive server learns about example.com, it will store that information about the A-record at example.com for one hour.