Articles
Practical writeups, troubleshooting notes, implementation guides, and reusable snippets for cloud, infrastructure, networking, automation, and AI workflows.
Reading paths
From noisy blocks to defensible WAF changes.
Cloud Azure private networkingMake private Azure paths testable and explainable.
Automation Automation guardrailsExpose useful operations without turning AWX into a remote console.
Infrastructure Operations runbooksTurn architecture and infrastructure into repeatable operations.
Build an operational runbook for private Azure Functions failures by separating DNS, Private Endpoint, access restrictions, private storage, Application Insights logs and rollback evidence.
Read featured articleA short query to separate DNS, private access, Functions runtime and application exceptions during a private HTTP incident.
Read articleBuild an operational runbook for AKS private ingress failures by separating DNS, Application Gateway, ingress controller, Kubernetes service endpoints, pod readiness and rollback evidence.
Read articleA short query to read ingress controller and application logs together when a private AKS route returns 502, timeouts or no endpoints.
Read articleBuild an operational runbook for Azure Container Apps private ingress failures by separating DNS, ingress mode, revision routing, application logs and rollback evidence.
Read articleA short query to correlate Azure Container Apps system and console logs when private ingress, probes or revision traffic fail.
Read articleQualify a failure across Application Gateway, WAF, internal APIM and a private backend by separating DNS, routing, policy, identity and logs before any fix.
Read articleA short query to see whether a private API request is blocked by Application Gateway WAF, received by APIM or missing from the expected path.
Read articleBuild a runbook for Key Vault, Storage or private API access failures with managed identity, RBAC, private DNS, logs and real execution evidence.
Read articleA short query to separate identity denial, network path and source address when an Azure workload can no longer access Key Vault.
Read articleBuild useful synthetic probes for DNS, TLS, Application Gateway, WAF and Private Endpoint so private Azure paths fail with evidence before production incidents.
Read articleA short query to track synthetic probe failures and separate DNS, TLS, WAF or Application Gateway symptoms on an Azure private path.
Read articleApply a temporary Azure WAF custom rule with priority, KQL evidence, business validation and rollback, without permanently hiding managed-rule signals.
Read articleA short command to list custom rules in an Azure WAF policy with priority, action and type before an urgent change.
Read articleBuild operable rotation for secrets, certificates, and application identities with dependency inventory, evidence, change windows, monitoring, and rollback.
Read articleA short query to watch 401, 403, and 500 errors after rotating an application secret or service identity.
Read articleBuild an operational drift reading across Terraform, Private Endpoint, private DNS, CI runners, and validation evidence before a private Azure path breaks in production.
Read articleA short check to compare the expected DNS chain, returned private address, and test path from a workload or CI runner.
Read articleAn operational approach to securing the Azure Functions Storage account with Private Endpoint without breaking runtime behavior, deployments, DNS resolution, triggers, and operational checks.
Read articleBuild useful alerts by connecting signal, diagnosis, scope, decision and rollback path instead of accumulating noisy notifications.
Read articleA short sequence to confirm that an Azure service exposed through Private Endpoint resolves to a private address from the right network.
Read articleA short KQL query to identify the most blocked URIs by Azure Web Application Firewall on Application Gateway.
Read articleA short procedure to qualify a stuck Terraform lock, confirm that no apply is still active, and restart with a clean plan.
Read articleDesign an Azure Terraform backend based on a private Storage Account with CI identity, controlled network access, locking, separate bootstrap, and a diagnostic runbook when init or plan fails.
Read articleAn operational method to analyze access failures to Azure Key Vault behind Private Endpoint by separating DNS resolution, network path, managed identity, RBAC, and application configuration.
Read articleA concrete method to operate Azure Key Vault with private endpoint, private DNS, managed identities, secret rotation, and application-side validation controls.
Read articleA practical method to analyze an Azure WAF block, isolate the rule involved, compare application evidence, and decide between a fix, a targeted exclusion, or a custom rule.
Read articleKnow when to add an Azure WAF custom rule to block or allow precise traffic before managed OWASP/CRS rules, without hiding useful security signals.
Read articleMove from a qualified WAF block to a targeted OWASP/CRS exclusion in an Azure Application Gateway policy, with scope, variable, rule, validation and rollback.
Read articleA KQL analysis method to qualify an Azure WAF block, distinguish attack, noise and application false positive, then document the decision before any exclusion.
Read articleBuild useful KQL queries to identify requests blocked by Azure Web Application Firewall on Application Gateway, with action, ruleId, URI, client IP, hostname and time window.
Read articleStructure architecture documentation that remains useful after production with decisions, limits, validation commands, failure modes, rollback and operational evidence.
Read articleDesign a private AI agent with technical guardrails around internal sources, triggered actions, identities, logs, human validation and network boundaries.
Read articleBuild a restore-first Proxmox Backup Server strategy with workload criticality, periodic tests, restore evidence, datastore monitoring and an operable recovery procedure.
Read articleA diagnostic procedure for Linux Active Directory incidents after a successful join: SSSD, Kerberos, DNS, cache, time, machine account and distribution differences.
Read articleOrganize an Ansible repository used by AWX with bounded playbooks, reusable roles, separated inventories, readable variables, versioned collections and operations documentation.
Read articleTurn AWX into a controlled operations tool with bounded job templates, limited variables, separated credentials, explicit inventories and post-action validation.
Read articleCompare the roles of Azure DNS Private Resolver, on-premises DNS forwarders, Azure private zones and forwarding rulesets to build readable hybrid name resolution.
Read articleA diagnostic method for Azure Application Gateway 502 errors that separates DNS resolution, probes, backend settings, TLS, hostnames, certificates and real application behavior.
Read articleClarify the roles of Private Endpoint, VNet Integration, Application Gateway, API Management, DNS, routing and application authentication in a private Azure architecture.
Read articlePrepare an Azure Private Endpoint production rollout with a validation matrix that separates DNS, routing, public access closure, TLS, application dependencies and tests from Azure and on premises.
Read articleDesign a private API flow where API Management stays internal and calls an Azure Function exposed through Private Endpoint, with private DNS, clear network boundaries and operational checks.
Read articleAn operational walkthrough for publishing a controlled business application behind Azure Application Gateway with dedicated HTTPS listeners, mutual TLS, a scoped WAF policy, HTTPS backends, and network validation points.
Read articleBuilding an Azure AI Foundry agent that reads internal data, triggers controlled actions, and remains operable inside a private network architecture.
Read articleA practical diagnostic procedure for an Azure Linux VM that fails to join Active Directory, with DNS, routing, ports, Kerberos, realmd, and SSSD checks.
Read articleA concrete use case for running AWX on a small Linux estate with Git inventories, separated credentials, controlled job templates, backups, and post-run checks.
Read articleOrganizing Azure Private DNS Zones in a hub and spoke architecture without multiplying links, exceptions, and configurations that become difficult to operate.
Read articleA concrete use case for protecting a small Proxmox VE cluster with Proxmox Backup Server, workload-based retention, restore tests, datastore monitoring, and a recovery runbook.
Read articleA production-oriented note on AWX with the operator, including namespace design, persistence, exposure, execution environments, validation, backups, and the failure modes that appear after the first successful login.
Read articleA practical note on Azure App Service and Functions VNet Integration, focused on outbound reachability, DNS, routing, NSGs, UDRs, NAT, and the design mistakes that appear when teams assume the app itself becomes privately exposed.
Read articleA practical guide to Azure DNS Private Resolver, inbound and outbound endpoints, rulesets, and hybrid forwarding patterns for private DNS and on premises name resolution.
Read articleA practical runbook-style article on Private Endpoints, private DNS zones, hybrid resolution, validation commands, and the failure patterns that create NXDOMAIN and misleading network diagnostics.
Read articleA multi-distribution runbook for joining Linux to Active Directory with realmd, adcli, SSSD, Kerberos, validation steps, and the checks that catch fragile integrations before they reach production.
Read articleA runbook-style article on Proxmox VE cluster design, quorum, storage, networking, backups, and the checks that matter before presenting a cluster as a production platform.
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