Thoughts on Azure, networking, and cloud infrastructure
If Azure WAF is blocking legitimate traffic after a policy update, new deployment, or rule set upgrade, false positives are the most common cause. This guide walks through 7 diagnostic phases to identify, reproduce, and safely exclude the offending rule — without disabling WAF protection.
If your VPN Gateway CPU is above 85% while traffic volume looks normal, BGP route bloat is almost certainly the cause. This guide covers the exact commands to diagnose it, route summarization on the CE router, an Azure-side prefix filter for defense in depth, and when to upgrade the gateway SKU.
If your enterprise SSO logins are returning AADSTS errors, redirect_uri mismatches, or silent token refresh failures, this guide walks through 8 diagnostic steps to locate and fix the root cause — covering OAuth 2.0, OIDC, Entra ID app registration, and high-availability token caching.
If some pods in your AKS cluster resolve external DNS names fine and others fail — from the same Deployment, same image, same config — the variable is the node. This guide covers the exact test sequence to isolate CoreDNS upstream forwarding failures, identify /etc/resolv.conf drift on worker nodes, and fix it without reprovisioning.
If your ExpressRoute Gateway shows BGP Connected but cross-premises traffic is down and effective routes on spoke VNet NICs are empty, the gateway has a control-plane failure. This guide covers the diagnostic commands to confirm it, a regional failover procedure, and the zone-redundant HA architecture to prevent recurrence.
