What is a good TTL for DNS?

Generally, we recommend a TTL of 24 hours (86,400 seconds). However, if you are planning to make DNS changes, you should lower the TTL to 5 minutes (300 seconds) at least 24 hours in advance of making the changes. After the changes are made, increase the TTL back to 24 hours.

What does TTL in DNS mean?

time to live
Updated: 7/14/2020. DNS TTL (time to live) is a setting that tells the DNS resolver how long to cache a query before requesting a new one. The information gathered is then stored in the cache of the recursive or local resolver for the TTL before it reaches back out to collect new, updated details.

How do I find my DNS TTL value?

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.

What happens when DNS TTL expires?

DNS records If a stub resolver queries the caching nameserver for the same record before the TTL has expired, the caching server will simply reply with the already cached resource record rather than retrieve it from the authoritative nameserver again.

What is a normal TTL?

By default, in Windows and many other OS’s, the TTL will be 128 — that means that after a packet passes through 128 routers, if it hasn’t reached it’s final destination yet, the packet will expire and will be removed from the network.

How do I reduce TTL in DNS?

Click the domain you want to edit. Under DNS & ZONE FILES, click on Edit DNS Zone File. Scroll down to the Additional Zone Actions tool, click on the Lower TTL button. This will lower the TTL value to 5 minutes.

What happens when TTL is 0?

If at any point the TTL count is equal to zero after the subtraction, the router will discard the packet and send an ICMP message back to the originating host. The commonly used network commands ping and traceroute both utilize TTL.

Can we change TTL value?

Overview. It is possible to raise and lower the TTL (Time To Live) value for your domains hosted at (mt) Media Temple. TTL is the value that determines how long your current DNS settings are cached with Internet Service Providers.

How do I find my DNS TTL?

Windows. On Windows, you can use the nslookup utility to check the DNS TTL values for a website. First, open a command prompt window. This will return the authoritative name server’s info for that domain, including the default TTL in both seconds and hours.