Module 1: Implement DNS for Windows Server IaaS VMs > Unit: Troubleshoot DNS

Question	Answer
What do you do if you can not create a DNS zone in Azure?	1. Review the Azure DNS audit log 2. Each DNS zone must be named uniquely within a resource group, check this 3. If you have exceeded the maximum number of zones, use another subscription or contact Azure support
What do you do if you can not create a DNS record in Azure DNS?	1. Review the Azure DNS audit log 2. when creating a record at the zone root, use @ as a prefix. 3. Make sure you do not have an CNAME conflict 4. Make sure you have not hit the record set limit
What do you do if you can not resolve a DNS record that is hosted in Azure DNS?	1. Check if the query is correct 2. Check if the records are correct in Azure DNS 3. Check the local DNS cache, empty if necessary
What can you do with the NSLookup tool?	Query DNS information
What can you do with the DNSCmd tool?	Manage the DNS server role from cmd
What can you do with the DNSlint tool?	Diagnose common DNS issues and create an HTML report
What can you do with the IPConfig utility?	Review IP configuration of the computer View the cuurrent DNS cache, clear the DNS cache and register the computer in DNS
What can you do in the monitoring tab of the DNS server properties?	Test connection with upstream DNS servers
What are common steps in DNS troubleshooting?	1. ipconfig /flushdns 2. ping on IP 3. ping on hostname 4. Nlsookup

Resource summary

	Created by Rick Schoenman about 2 years ago