Azure Virtual Network Verifier for AKS,
now in public preview and available through the Azure Portal, is a tool which allows
you to detect and troubleshoot outbound connectivity issues in your AKS
cluster.
You can use the Virtual Network Verifier feature
to run a connectivity analysis to check the traffic flow between your cluster
and a public egress endpoint (for example, mcr.microsoft.com). The analysis
results will detect any misconfigured Azure networking resources which may be
blocking outbound traffic such as Azure firewall, network security groups (NSG),
and load balancers.
Learn more.