Learn how to resolve Windows Update failures on Azure Virtual Machines by creating an FQDN tag application rule in Azure Firewall. Minimize administrative effort with this simple solution for your Azure VNet and Azure Firewall setup.
Table of Contents
Question
You have an Azure subscription that contains an Azure Virtual Network named VNet1 and an Azure Firewall named FW1. VNet1 is associated with 50 virtual machines that use a user-defined route directed to FW1.
You discover that Windows Update is failing on the virtual machines.
You need to create an application rule for FW1. The solution must minimize administrative effort.
Which type of application rule should you create?
A. FQDN rule
B. FQDN tag
C. IP rule
D. service tag
Answer
B. FQDN tag
Explanation
Though possible with an IP rule and an FQDN rule, it will be difficult to look up all of the URLs and IP addresses needed to manually create the rule. The easiest method is to select the Windows Update FQDN tag.
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