How do I troubleshoot DNS slowness?

Table of Contents

10 Ways to Troubleshoot DNS Resolution Issues

Introduction.
Check for network connectivity.
Verify your DNS server IP addresses are correct and in order.
Ping the IP address of the host you are trying to get to (if it is known)
Find out what DNS server is being used with nslookup.
Check your DNS suffix.

How many DNS forwarders should I have?

This decreases the Internet traffic over the network and improves the response time for DNS clients. However, having said that, you may want to have at least 2 working DNS servers acting as forwarders because if one fails you will still have name resolution.

How do I increase my DNS speed?

However, there is a simple way to speed up DNS propagation:

Define or modify an A record that points your hostname to the new destination IP address.
Set a minimal TTL for that DNS record—we recommend 5 minutes. Below that, many ISPs might ignore the TTL and retain the old record in cache.

How do I check DNS forwarding?

DNS Forwarder on Windows Server 2016/2019

3 – Click the Forwarders tab and click the Edit button.
4 – Enter the IPv4 DNS values provided in your dashboard:
That’s it, click OK and you should see a new Forwarders file appear in the DNS Manager.

What are DNS zones used for?

A DNS zone is used to host the DNS records for a particular domain. To start hosting your domain in Azure DNS, you need to create a DNS zone for that domain name. Each DNS record for your domain is then created inside this DNS zone.

What is the purpose of a DNS zone?

A DNS zone is a portion of the DNS namespace that is managed by a specific organization or administrator. A DNS zone is an administrative space which allows for more granular control of DNS components, such as authoritative nameservers. The domain name space is a hierarchical tree, with the DNS root domain at the top.

Should I use forwarders or root hints?

The best use of root hints is on internal DNS servers at lower levels of the namespace. Root hints should not be used for querying DNS servers outside your organization; DNS forwarders are better equipped for performing this function.