Chapter 12, Azure Security Groups and Azure DNS

1. 2—You should use the following commands to add the DNS:
   New-AzDnsRecordSet -Name "@" -RecordType "A" -ZoneName "packtpub.com" `
   -ResourceGroupName "MyAzureResourceGroup" -Ttl 600 `
   -DnsRecords (New-AzDnsRecordConfig -IPv4Address "<your web app IP address>")
   
   New-AzDnsRecordSet -ZoneName packtpub.com -ResourceGroupName PacktAzureResourceGroup `
   -Name "@" -RecordType "txt" -Ttl 600 `
   -DnsRecords (New-AzDnsRecordConfig -Value "packtpub.azurewebsites.net")
2. 4—You should purchase the packtpub.com domain from a third-party domain registrar first, before taking any other steps.
3. 3—You should define application security groups (ASGs) that align to each application tier. This simplifies network administration in Azure and makes rule maintenance...