Understanding Azure Files Mounting Issues Azure Files supports SMB (port 445) and NFS (port 2049) protocols. Mounting failures come from blocked ports, authentication errors, protocol version mismatches, and private endpoint DNS issues. This guide covers both Windows and Linux scenarios.…
Author: Zeeshan Mustafa
How to harden security of Azure Firewall
Azure Firewall Is Your Network Perimeter — Configure It Right Azure Firewall provides centralized network security for your Azure virtual networks. It inspects and filters traffic at layers 3-7, but its effectiveness depends entirely on configuration. A default-allow Firewall policy…
How to troubleshoot Azure Cognitive Search query latency and performance issues
Understanding Azure Cognitive Search Performance Azure AI Search (formerly Azure Cognitive Search) can suffer from slow queries, high latency, and indexer bottlenecks. This guide covers query optimization, index design, partition strategy, and diagnostic techniques to restore performance. Why This Problem…
How to fix Azure Service Bus queue dead-lettering issues
Understanding Azure Service Bus Dead-Lettering Azure Service Bus provides enterprise-grade message queuing with features like sessions, transactions, and dead-letter queues (DLQ). The dead-letter queue is a secondary sub-queue that holds messages that cannot be delivered or processed. While dead-lettering is…
How to troubleshoot Azure SQL high DTU usage and query performance
Understanding Azure SQL Performance Azure SQL Database high DTU usage causes query timeouts, connection failures, and degraded application performance. This guide covers identifying resource bottlenecks, optimizing queries, managing blocking, and scaling strategies. Why This Problem Matters in Production In enterprise…
How to fix distributed tracing gaps in Application Insights
Understanding Distributed Tracing in Application Insights Distributed tracing in Application Insights correlates telemetry across multiple services, showing the complete path of a request through your system. Tracing gaps — where parts of the request chain are missing or disconnected —…
How to harden security of Azure Identity (Entra ID)
Entra ID Is the Foundation of Your Security Posture Azure Identity (Microsoft Entra ID) is the identity provider for every Azure resource, Microsoft 365 service, and thousands of SaaS applications. A compromised identity can access every system that trusts Entra…
How to Resolve BackendConnectionFailure in Azure API Management
Understanding BackendConnectionFailure in APIM Azure API Management (APIM) returns BackendConnectionFailure when it cannot establish or maintain a connection to your backend service. This error often manifests as intermittent 502 Bad Gateway or 504 Gateway Timeout responses. The most common underlying…
How to optimize RU consumption in Azure Cosmos DB to avoid throttling
Understanding Request Units and Throttling in Cosmos DB Azure Cosmos DB uses Request Units (RUs) as its unified currency for database operations. Every read, write, query, and stored procedure execution consumes a specific number of RUs. When your operations consume…
How to fix manifest unknown errors when pulling images from ACR
Understanding “Manifest Unknown” Errors in ACR The error “manifest unknown” when pulling images from Azure Container Registry (ACR) means the registry cannot find the specified image manifest. This is the metadata document that describes an image’s layers and configuration. The…