TCP/IP

Outgrowing SQL Server Express? Upgrade to Azure SQL Database Free Tier in 3 Steps

If you’ve been building local prototypes, internal tools, web backends, or lightweight services on SQL Server Express, you know the routine: it’s free, familiar, and gets the job done – until you hit hardware limits or spend weekends manual backup scripts and handling OS patches. Learn how to upgrade from SQL Server Express to Azure […]

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Container Network Insights Agent (CNIA): Your AI Teammate for AKS Networking Incidents

Hello Folks! If you run AKS in production, you already know the script. A pod cannot reach an external service, every dashboard says the cluster is healthy, and somebody is SSHing into a node with five browser tabs open trying to piece the story together.  This session from the Microsoft Azure Infra Summit 2026 tackles

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Troubleshooting SQL Authentication Failures on Azure SQL Database Geo-Secondary Replicas

Scenario Background During a recent investigation, a customer reported that SQL Authentication was failing when connecting to an Azure SQL Database geo-secondary replica. The customer confirmed the following: SQL Authentication worked successfully against the primary replica. The geo-secondary database was healthy and synchronized. The replicated database user existed in the secondary database. Microsoft Entra authentication

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Some tools and techniques for hardening Windows Server

In this post I go over some tools and techniques exist for hardening Windows Server. As always, apply controls according to the server’s role, test them against representative workloads before production rollout, document approved exceptions, and maintain tested console and recovery access in case a security control affects management or application compatibility. Apply the role-specific

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Design the Network Before You Deploy: Best Practices for Microsoft Foundry Standard Agents BYOVNet

Ask any enterprise team standing up Microsoft Foundry in production and you’ll hear the same non-negotiable: the agent can’t run on the open internet. The moment it touches proprietary data, internal APIs, or regulated workloads, security wants it inside the company’s own virtual network — behind private endpoints, a central firewall, and controlled DNS. That

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Network Security Perimeter for Azure Event Hubs: Hardening Your Data Streams

What is Network Security Perimeter for Azure Event Hubs? Azure Event Hubs now supports Network Security Perimeter (NSP), a logical network isolation boundary that lets you define a security perimeter around your PaaS resources and control public network access through perimeter-based access rules. In practical terms, this means you can now group Event Hubs resources

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Generic Best Practices for HikariCP with Azure Database for PostgreSQL

Author: Mohamed BaioumyTechnology: Azure Database for PostgreSQL (Flexible Server & Single Server)Category: Connectivity | Performance | Application Design Introduction Connection pooling is a critical component of application performance when connecting to Azure Database for PostgreSQL. Creating a new PostgreSQL connection is an expensive operation that consumes CPU, memory, and networking resources. Reusing existing connections through

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Microsoft Entra Private Access vs Global Secure Access

If you have been researching Microsoft’s zero trust network access offering and found yourself confused by “Global Secure Access,” “Entra Private Access,” and “Internet Access” all appearing in the same sentence, you are not alone. The naming is genuinely confusing, even for architects who work in the Microsoft ecosystem daily. This article cuts through the

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AI Infrastructure Preflight at User space: Validating Multi Node, Multi GPU Slurm Clusters

Every team that operates GPU clusters for AI has seen this pattern. The cluster boots, GPUs are visible, and scheduling works at a basic level. Then the first distributed training run stalls in NCCL initialization, fails during rank rendezvous, or silently maps ranks to the wrong devices. The issue is often not in training code.

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Distributing model weights to your AI cluster: a faster pre-flight on AKS and Slurm

Why this exists You’ve provisioned a multi-node GPU cluster on Azure. NDR InfiniBand. The training script is ready. Before any GPU does any useful work, every node needs the same 400 GB model checkpoint on its local NVMe. The naive approach — azcopy (or our Rust equivalent, azcp) on every node, in parallel — has three problems: You pay Azure

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