1---2name: azure-application-gateway3description: Expert knowledge for Azure Application Gateway development including troubleshooting, best practices, decision making, architecture & design patterns, limits & quotas, security, configuration, integrations & coding patterns, and deployment. Use when configuring listeners/routing, WAF/TLS, autoscale v2 gateways, AKS ingress/AGIC, or App Gateway for Containers, and other Azure Application Gateway related development tasks. Not for Azure Front Door (use azure-front-door), Azure Load Balancer (use azure-load-balancer), Azure Traffic Manager (use azure-traffic-manager), Azure Firewall (use azure-firewall).4---5# Azure Application Gateway Skill67This skill provides expert guidance for Azure Application Gateway. Covers troubleshooting, best practices, decision making, architecture & design patterns, limits & quotas, security, configuration, integrations & coding patterns, and deployment. It combines local quick-reference content with remote documentation fetching capabilities.89## How to Use This Skill1011> **IMPORTANT for Agent**: Use the **Category Index** below to locate relevant sections. For categories with line ranges (e.g., `L35-L120`), use `read_file` with the specified lines. For categories with file links (e.g., `[security.md](security.md)`), use `read_file` on the linked reference file1213This skill requires **network access** to fetch documentation content:14- **Preferred**: Use `mcp_microsoftdocs:microsoft_docs_fetch`. Returns Markdown.15- **Fallback**: Use `WebFetch`. Returns Markdown.1617## Category Index1819| Category | Lines | Description |20|----------|-------|-------------|21| Troubleshooting | L33-L38 | Diagnosing and fixing common Application Gateway for Containers issues using ALB Controller backend health, metrics, and troubleshooting guides for connectivity, routing, and configuration errors. |22| Best Practices | L39-L43 | Guidance on designing Application Gateway for very high traffic: sizing, autoscaling, performance tuning, capacity planning, and configuration patterns to handle large loads reliably. |23| Decision Making | L44-L55 | Guidance on pricing, billing, and migration decisions for Application Gateway (V1→V2, AGIC→Containers, classic→ARM VMs) and choosing networking for Application Gateway for Containers |24| Architecture & Design Patterns | L56-L60 | Guidance on choosing and designing load-balancing strategies and traffic distribution patterns when using Azure Application Gateway for Containers. |25| Limits & Quotas | L61-L66 | Autoscaling, zone redundancy setup, and detailed limits/behavioral constraints (throughput, listeners, rules, connections) for Azure Application Gateway v2. |26| Security | L67-L108 | TLS/mTLS, certificates (Key Vault, Let’s Encrypt, cert-manager), cipher/TLS policies, SSL offload, WAF, DDoS, HSTS, and secure listener/backend configs for Application Gateway and Containers |27| Configuration | L109-L174 | Configuring Azure Application Gateway and Application Gateway for Containers: listeners, routing, probes, health, headers/URL rewrite, session affinity, networking, monitoring, diagnostics, and AKS ingress. |28| Integrations & Coding Patterns | L175-L182 | Patterns for integrating App Gateway for Containers with monitoring, security, and scaling tools: Prometheus/Grafana, Istio, Sentinel/Defender, and AKS pod autoscaling via gateway metrics. |29| Deployment | L183-L195 | Guides for deploying and migrating Application Gateway (v1→v2, IPv6, mTLS), configuring autoscale, and setting up/upgrading AGIC with AKS using portal, ARM, PowerShell, and Helm. |3031### Troubleshooting32| Topic | URL |33|-------|-----|34| Use ALB Controller backend health and metrics for troubleshooting | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/alb-controller-backend-health-metrics |35| Troubleshoot common issues in Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/troubleshooting-guide |3637### Best Practices38| Topic | URL |39|-------|-----|40| Plan Application Gateway for high traffic volume scenarios | https://learn.microsoft.com/en-us/azure/application-gateway/high-traffic-support |4142### Decision Making43| Topic | URL |44|-------|-----|45| Choose container networking for Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/container-networking |46| Decide and plan migration from AGIC to Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/migrate-from-agic-to-agc |47| Estimate and understand pricing for Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/understanding-pricing |48| Migrate Azure Application Gateway and WAF from V1 to V2 | https://learn.microsoft.com/en-us/azure/application-gateway/migrate-v1-v2 |49| FAQ for Azure Application Gateway V1 retirement and migration | https://learn.microsoft.com/en-us/azure/application-gateway/retirement-faq |50| Understand billing and pricing for Azure Application Gateway SKUs | https://learn.microsoft.com/en-us/azure/application-gateway/understanding-pricing |51| Plan for Azure Application Gateway V1 retirement | https://learn.microsoft.com/en-us/azure/application-gateway/v1-retirement |52| Decide and plan migration from classic to Azure Resource Manager VMs | https://learn.microsoft.com/en-us/previous-versions/azure/virtual-machines/migration/migration-classic-resource-manager-faq |5354### Architecture & Design Patterns55| Topic | URL |56|-------|-----|57| Choose load balancing strategies in Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/load-balancing-strategies |5859### Limits & Quotas60| Topic | URL |61|-------|-----|62| Configure autoscaling and zone redundancy for Application Gateway v2 | https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-autoscaling-zone-redundant |63| Azure Application Gateway limits and behavioral constraints | https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-faq |6465### Security66| Topic | URL |67|-------|-----|68| Set listener-specific TLS/SSL policies on Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-configure-listener-specific-ssl-policy |69| Configure TLS protocol and cipher suite policy on Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-configure-ssl-policy-powershell |70| Configure end-to-end TLS on Application Gateway with PowerShell | https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-end-to-end-ssl-powershell |71| Deploy a private Azure Application Gateway with restricted access | https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-private-deployment |72| Secure Application Gateway session affinity cookie flags | https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-secure-flag-session-affinity |73| Configure TLS policies and cipher suites for Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-ssl-policy-overview |74| Plan for TLS 1.0/1.1 retirement on Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-tls-version-retirement |75| Prepare certificates for backend authentication in Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/certificates-for-backend-authentication |76| Configure Key Vault-based TLS certificates via portal | https://learn.microsoft.com/en-us/azure/application-gateway/configure-key-vault-portal |77| Integrate Key Vault certificates for TLS on Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/configure-keyvault-ps |78| Set up end-to-end TLS on Application Gateway via portal | https://learn.microsoft.com/en-us/azure/application-gateway/end-to-end-ssl-portal |79| Enable FIPS 140-compliant mode on Application Gateway v2 | https://learn.microsoft.com/en-us/azure/application-gateway/fips |80| Configure ECDSA and RSA TLS certificates on Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/ecdsa-rsa-certificates |81| Configure backend mTLS for Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/how-to-backend-mtls-gateway-api |82| Use cert-manager and Let’s Encrypt with Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/how-to-cert-manager-lets-encrypt-gateway-api |83| Integrate cert-manager and Let’s Encrypt with Application Gateway for Containers Ingress | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/how-to-cert-manager-lets-encrypt-ingress-api |84| Configure end-to-end TLS with Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/how-to-end-to-end-tls-gateway-api |85| Configure end-to-end TLS with Application Gateway for Containers Ingress | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/how-to-end-to-end-tls-ingress-api |86| Enable frontend mTLS on Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/how-to-frontend-mtls-gateway-api |87| Configure SSL offloading on Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/how-to-ssl-offloading-gateway-api |88| Configure SSL offloading using Ingress API for Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/how-to-ssl-offloading-ingress-api |89| Test and configure Web Application Firewall on Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/how-to-waf-gateway-api |90| Configure TLS policy for Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/tls-policy |91| Configure Web Application Firewall on Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/web-application-firewall |92| Add HSTS security header using Application Gateway rewrite | https://learn.microsoft.com/en-us/azure/application-gateway/hsts-http-headers-portal |93| Use Let's Encrypt certificates with Application Gateway for AKS | https://learn.microsoft.com/en-us/azure/application-gateway/ingress-controller-letsencrypt-certificate-application-gateway |94| Configure JWT validation with Azure Application Gateway and Entra ID | https://learn.microsoft.com/en-us/azure/application-gateway/json-web-token-overview |95| Use Azure Key Vault certificates for Application Gateway TLS termination | https://learn.microsoft.com/en-us/azure/application-gateway/key-vault-certs |96| Export trusted client CA chains for Application Gateway client auth | https://learn.microsoft.com/en-us/azure/application-gateway/mutual-authentication-certificate-management |97| Configure mutual TLS authentication on Azure Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/mutual-authentication-overview |98| Configure mutual TLS authentication on Application Gateway via portal | https://learn.microsoft.com/en-us/azure/application-gateway/mutual-authentication-portal |99| Configure mutual TLS on Application Gateway with PowerShell | https://learn.microsoft.com/en-us/azure/application-gateway/mutual-authentication-powershell |100| Renew TLS certificates for Azure Application Gateway listeners | https://learn.microsoft.com/en-us/azure/application-gateway/renew-certificates |101| Generate self-signed certificates for Application Gateway v2 backends | https://learn.microsoft.com/en-us/azure/application-gateway/self-signed-certificates |102| Manage listener TLS certificates in Azure Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/ssl-certificate-management |103| Protect Application Gateway with Azure DDoS Network Protection | https://learn.microsoft.com/en-us/azure/application-gateway/tutorial-protect-application-gateway-ddos |104| Configure TLS termination on Application Gateway with CLI | https://learn.microsoft.com/en-us/azure/application-gateway/tutorial-ssl-cli |105| Configure TLS termination on Application Gateway with PowerShell | https://learn.microsoft.com/en-us/azure/application-gateway/tutorial-ssl-powershell |106107### Configuration108| Topic | URL |109|-------|-----|110| Configure HTTP header rewrite in Application Gateway via PowerShell | https://learn.microsoft.com/en-us/azure/application-gateway/add-http-header-rewrite-rule-powershell |111| Use backend health reports in Azure Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-backend-health |112| Configure custom probe in classic Application Gateway via PowerShell | https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-create-probe-classic-ps |113| Create custom health probe in Application Gateway portal | https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-create-probe-portal |114| Configure custom probe in Application Gateway via PowerShell | https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-create-probe-ps |115| Configure and interpret Application Gateway diagnostic logs | https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-diagnostics |116| Create and manage Application Gateway with ILB endpoint | https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-ilb-arm |117| Use Azure Monitor metrics for Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-metrics |118| Health probe behavior and configuration in Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-probe-overview |119| Configure frontend IP addresses for Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/configuration-frontend-ip |120| Configure backend HTTP settings for Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/configuration-http-settings |121| Configure Azure Application Gateway infrastructure networking | https://learn.microsoft.com/en-us/azure/application-gateway/configuration-infrastructure |122| Configure listeners and protocols on Azure Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/configuration-listeners |123| Configure core components of Azure Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/configuration-overview |124| Configure request routing rules in Azure Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/configuration-request-routing-rules |125| Configure Azure Monitor alerts for Application Gateway via templates | https://learn.microsoft.com/en-us/azure/application-gateway/configure-alerts-with-templates |126| Configure private frontend IP for Application Gateway v1 | https://learn.microsoft.com/en-us/azure/application-gateway/configure-application-gateway-with-private-frontend-ip |127| Configure Application Gateway with Azure App Service backend | https://learn.microsoft.com/en-us/azure/application-gateway/configure-web-app |128| Create custom error pages in Azure Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/custom-error |129| Configure ALB Controller Helm chart for Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/alb-controller-helm-chart |130| Configure Application Gateway for Containers via Kubernetes API | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/api-specification-kubernetes |131| Configure components of Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/application-gateway-for-containers-components |132| Use Azure Monitor metrics with Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/application-gateway-for-containers-metrics |133| Configure custom health probes for Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/custom-health-probe |134| Enable and use diagnostic logs for Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/diagnostics |135| Enable and configure gRPC support on Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/grpc |136| Configure HTTP header rewrite rules in Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/how-to-header-rewrite-gateway-api |137| Configure HTTP header rewrite using Ingress API for Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/how-to-header-rewrite-ingress-api |138| Configure multi-site hosting on Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/how-to-multiple-site-hosting-gateway-api |139| Configure multi-site hosting using Ingress API for Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/how-to-multiple-site-hosting-ingress-api |140| Set up path, header, and query string routing in Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/how-to-path-header-query-string-routing-gateway-api |141| Configure traffic splitting and weighted routing in Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/how-to-traffic-splitting-gateway-api |142| Configure URL redirect rules in Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/how-to-url-redirect-gateway-api |143| Configure URL redirects using Ingress API for Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/how-to-url-redirect-ingress-api |144| Configure URL rewrite rules in Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/how-to-url-rewrite-gateway-api |145| Configure URL rewrite using Ingress API for Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/how-to-url-rewrite-ingress-api |146| Configure WebSocket support in Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/how-to-websockets-gateway-api |147| Configure server-sent events with Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/server-sent-events |148| Configure ALB Service Mesh Helm chart for Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/service-mesh-helm-chart |149| Configure session affinity for Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/session-affinity |150| Use WebSocket protocol with Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/websockets |151| Configure readiness and liveness probes for AKS pods via Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/ingress-controller-add-health-probes |152| Configure Azure Application Gateway Ingress Controller annotations | https://learn.microsoft.com/en-us/azure/application-gateway/ingress-controller-annotations |153| Configure cookie-based session affinity with Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/ingress-controller-cookie-affinity |154| Expose AKS services over HTTP/HTTPS using Application Gateway ingress | https://learn.microsoft.com/en-us/azure/application-gateway/ingress-controller-expose-service-over-http-https |155| Expose WebSocket servers through Application Gateway with AGIC | https://learn.microsoft.com/en-us/azure/application-gateway/ingress-controller-expose-websocket-server |156| Enable multi-namespace support in Application Gateway Ingress Controller | https://learn.microsoft.com/en-us/azure/application-gateway/ingress-controller-multiple-namespace-support |157| Use private IPs for internal ingress routing with AGIC | https://learn.microsoft.com/en-us/azure/application-gateway/ingress-controller-private-ip |158| Monitor Azure Application Gateway with Azure Monitor | https://learn.microsoft.com/en-us/azure/application-gateway/monitor-application-gateway |159| Reference for monitoring data from Azure Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/monitor-application-gateway-reference |160| Configure multi-site hosting on Azure Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/multiple-site-overview |161| Configure mTLS passthrough on Application Gateway via ARM | https://learn.microsoft.com/en-us/azure/application-gateway/mutual-authentication-arm-template |162| Route traffic with parameter-based path selection in Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/parameter-based-path-selection-portal |163| Configure Private Link for Azure Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/private-link-configure |164| Configure request and response buffering in Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/proxy-buffers |165| Configure client IP preservation with Application Gateway Layer 4 proxy | https://learn.microsoft.com/en-us/azure/application-gateway/proxy-protocol-header |166| Configure traffic redirection rules in Azure Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/redirect-overview |167| Configure HTTP header rewrite in Application Gateway portal | https://learn.microsoft.com/en-us/azure/application-gateway/rewrite-http-headers-portal |168| Configure HTTP header and URL rewrite rules in Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/rewrite-http-headers-url |169| Configure URL and query string rewrite in Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/rewrite-url-portal |170| Create Application Gateway and configure header rewrite | https://learn.microsoft.com/en-us/azure/application-gateway/tutorial-http-header-rewrite-powershell |171| Configure URL path-based routing in Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/url-route-overview |172173### Integrations & Coding Patterns174| Topic | URL |175|-------|-----|176| Integrate App Gateway for Containers with Prometheus and Grafana | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/prometheus-grafana |177| Integrate Istio service mesh with Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/service-mesh-integration |178| Integrate Application Gateway for Containers logs with Microsoft Sentinel and Defender | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/siem-integration-with-sentinel |179| Autoscale AKS pods using Application Gateway metrics | https://learn.microsoft.com/en-us/azure/application-gateway/ingress-controller-autoscale-pods |180181### Deployment182| Topic | URL |183|-------|-----|184| Configure externally managed scheduled autoscaling for Application Gateway v2 | https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-externally-managed-scheduled-autoscaling |185| Deploy Application Gateway Basic (Preview) in portal | https://learn.microsoft.com/en-us/azure/application-gateway/deploy-basic-portal |186| Disable and re-enable AGIC add-on on AKS clusters | https://learn.microsoft.com/en-us/azure/application-gateway/ingress-controller-disable-addon |187| Deploy AGIC using an existing Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/ingress-controller-install-existing |188| Deploy AGIC with a new Application Gateway instance | https://learn.microsoft.com/en-us/azure/application-gateway/ingress-controller-install-new |189| Migrate AGIC from Helm deployment to AKS add-on | https://learn.microsoft.com/en-us/azure/application-gateway/ingress-controller-migration |190| Upgrade Application Gateway Ingress Controller using Helm | https://learn.microsoft.com/en-us/azure/application-gateway/ingress-controller-update-ingress-controller |191| ARM template for Application Gateway IPv6 frontend | https://learn.microsoft.com/en-us/azure/application-gateway/ipv6-application-gateway-arm-template |192| Deploy Application Gateway IPv6 frontend with PowerShell | https://learn.microsoft.com/en-us/azure/application-gateway/ipv6-application-gateway-powershell |193| Enable AGIC add-on for existing AKS and Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/tutorial-ingress-controller-add-on-existing |
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