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 App Gateway v2/Containers, WAF/TLS, AKS/AGIC ingress, Key Vault certs, or HTTP routing rules, and other Azure Application Gateway related development tasks. Not for Azure Load Balancer (use azure-load-balancer), Azure Front Door (use azure-front-door), Azure Virtual Network (use azure-virtual-network), Azure Web Application Firewall (use azure-web-application-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 file1213> **IMPORTANT for Agent**: If `metadata.generated_at` is more than 3 months old, suggest the user pull the latest version from the repository. If `mcp_microsoftdocs` tools are not available, suggest the user install it: [Installation Guide](https://github.com/MicrosoftDocs/mcp/blob/main/README.md)1415This skill requires **network access** to fetch documentation content:16- **Preferred**: Use `mcp_microsoftdocs:microsoft_docs_fetch` with query string `from=learn-agent-skill`. Returns Markdown.17- **Fallback**: Use `fetch_webpage` with query string `from=learn-agent-skill&accept=text/markdown`. Returns Markdown.1819## Category Index2021| Category | Lines | Description |22|----------|-------|-------------|23| Troubleshooting | L37-L43 | Diagnosing backend health and metrics, interpreting ALB Controller status, and troubleshooting common connectivity, routing, and configuration issues in Application Gateway for Containers. |24| Best Practices | L44-L49 | Tuning health probes, understanding probe behavior, and planning Application Gateway capacity, scaling, and configuration for high-traffic workloads. |25| Decision Making | L50-L60 | Guidance on choosing networking and pricing for Application Gateway for Containers and planning/migrating between AGIC, v1/v2 gateways, and classic vs ARM VMs. |26| Architecture & Design Patterns | L61-L65 | Guidance on choosing and designing load-balancing strategies and traffic distribution patterns when using Azure Application Gateway for Containers. |27| Limits & Quotas | L66-L71 | Configuring autoscaling, zone redundancy, and multi-site hosting limits for Application Gateway v2, including capacity, scaling behavior, and site/hostname constraints. |28| Security | L72-L113 | Configuring TLS/SSL, certificates, mTLS, cipher suites, Key Vault, HSTS, WAF, and private access for securing Azure Application Gateway and Application Gateway for Containers. |29| Configuration | L114-L176 | Configuring Application Gateway and Application Gateway for Containers: listeners, routing, probes, health, headers/URL rewrites, WebSockets, HTTP/3, mTLS, Private Link, monitoring, and AKS/Ingress integration. |30| Integrations & Coding Patterns | L177-L186 | Patterns and scripts for integrating App Gateway with AKS, Key Vault, Prometheus/Grafana, Sentinel/Defender, HTTP header rewrites, request mirroring, and autoscaling pods via gateway metrics |31| Deployment | L187-L199 | Deploying and scaling Application Gateway and AGIC: portal/ARM/PowerShell setup, IPv6 frontends, AKS add-on enable/disable, migrations, and Helm-based upgrades. |3233### Troubleshooting34| Topic | URL |35|-------|-----|36| Diagnose backend health states in Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-backend-health |37| 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 |38| Troubleshoot common issues in Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/troubleshooting-guide |3940### Best Practices41| Topic | URL |42|-------|-----|43| Health probe behavior and tuning for Azure Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-probe-overview |44| Plan Application Gateway for high traffic volume scenarios | https://learn.microsoft.com/en-us/azure/application-gateway/high-traffic-support |4546### Decision Making47| Topic | URL |48|-------|-----|49| Choose container networking for Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/container-networking |50| 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 |51| Estimate and understand pricing for Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/understanding-pricing |52| Migrate Azure Application Gateway from V1 to V2 | https://learn.microsoft.com/en-us/azure/application-gateway/migrate-v1-v2 |53| FAQ for Azure Application Gateway V1 retirement and migration | https://learn.microsoft.com/en-us/azure/application-gateway/retirement-faq |54| Plan migration from Application Gateway V1 to V2 | https://learn.microsoft.com/en-us/azure/application-gateway/v1-retirement |55| 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 |5657### Architecture & Design Patterns58| Topic | URL |59|-------|-----|60| Choose load balancing strategies in Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/load-balancing-strategies |6162### Limits & Quotas63| Topic | URL |64|-------|-----|65| Configure autoscaling and zone redundancy for Application Gateway v2 | https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-autoscaling-zone-redundant |66| Configure multi-site hosting limits on Azure Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/multiple-site-overview |6768### Security69| Topic | URL |70|-------|-----|71| Configure listener-specific SSL policies in Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-configure-listener-specific-ssl-policy |72| Configure TLS policy and cipher suites for Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-configure-ssl-policy-powershell |73| Set up end-to-end TLS on Azure Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-end-to-end-ssl-powershell |74| Restrict access with private Azure Application Gateway deployment | https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-private-deployment |75| Secure Application Gateway session affinity cookie flags | https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-secure-flag-session-affinity |76| Configure TLS policies for Azure Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-ssl-policy-overview |77| 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 |78| Prepare certificates for backend authentication in Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/certificates-for-backend-authentication |79| Configure Key Vault TLS termination for Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/configure-key-vault-portal |80| 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 |81| Enable FIPS 140-compliant mode on Application Gateway v2 | https://learn.microsoft.com/en-us/azure/application-gateway/fips |82| 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 |83| 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 |84| 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 |85| 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 |86| 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 |87| 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 |88| 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 |89| 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 |90| 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 |91| 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 |92| Configure Istio mTLS ingress with Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/service-mesh-integration |93| Configure TLS policy for Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/tls-policy |94| Configure Web Application Firewall on Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/web-application-firewall |95| Add HSTS security header using Application Gateway rewrite | https://learn.microsoft.com/en-us/azure/application-gateway/hsts-http-headers-portal |96| 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 |97| Configure JWT validation with Azure Application Gateway and Entra ID | https://learn.microsoft.com/en-us/azure/application-gateway/json-web-token-overview |98| Use Azure Key Vault certificates for TLS termination on Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/key-vault-certs |99| Export trusted client CA chains for Application Gateway client auth | https://learn.microsoft.com/en-us/azure/application-gateway/mutual-authentication-certificate-management |100| Configure mutual TLS authentication on Azure Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/mutual-authentication-overview |101| Configure mutual TLS authentication on Application Gateway via portal | https://learn.microsoft.com/en-us/azure/application-gateway/mutual-authentication-portal |102| Configure mutual TLS on Application Gateway with PowerShell | https://learn.microsoft.com/en-us/azure/application-gateway/mutual-authentication-powershell |103| Secure Application Gateway access with Private Link endpoints | https://learn.microsoft.com/en-us/azure/application-gateway/private-link |104| Renew TLS certificates for Azure Application Gateway listeners | https://learn.microsoft.com/en-us/azure/application-gateway/renew-certificates |105| Generate self-signed certificates for Azure Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/self-signed-certificates |106| Manage listener TLS certificates in Azure Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/ssl-certificate-management |107| Configure TLS termination on Application Gateway with CLI | https://learn.microsoft.com/en-us/azure/application-gateway/tutorial-ssl-cli |108| Configure TLS termination on Application Gateway with PowerShell | https://learn.microsoft.com/en-us/azure/application-gateway/tutorial-ssl-powershell |109110### Configuration111| Topic | URL |112|-------|-----|113| Configure custom probe in classic Application Gateway via PowerShell | https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-create-probe-classic-ps |114| Configure custom health probes for Azure Application Gateway | 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| Configure frontend IP addresses for Azure Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/configuration-frontend-ip |119| Configure backend settings for Azure Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/configuration-http-settings |120| Configure Azure Application Gateway network infrastructure | https://learn.microsoft.com/en-us/azure/application-gateway/configuration-infrastructure |121| Configure Azure Application Gateway listeners and protocols | https://learn.microsoft.com/en-us/azure/application-gateway/configuration-listeners |122| Configure core components of Azure Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/configuration-overview |123| Configure request routing rules in Azure Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/configuration-request-routing-rules |124| Configure Azure Monitor alerts for Application Gateway via templates | https://learn.microsoft.com/en-us/azure/application-gateway/configure-alerts-with-templates |125| Configure private frontend IP for Application Gateway v1 | https://learn.microsoft.com/en-us/azure/application-gateway/configure-application-gateway-with-private-frontend-ip |126| Configure Application Gateway with Azure App Service backend | https://learn.microsoft.com/en-us/azure/application-gateway/configure-web-app |127| Create custom error pages in Azure Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/custom-error |128| Configure ALB Controller using Helm chart parameters | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/alb-controller-helm-chart |129| Use Kubernetes API specification for Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/api-specification-kubernetes |130| Configure core components of Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/application-gateway-for-containers-components |131| 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 |132| Configure custom health probes for Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/custom-health-probe |133| Enable and use diagnostic logs for Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/diagnostics |134| Enable and configure gRPC support on Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/grpc |135| Configure CORS in Gateway API for Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/how-to-cors-gateway-api |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 Application Gateway for Containers inference gateway | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/how-to-inference-gateway |139| 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 |140| 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 |141| 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 |142| 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 |143| 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 |144| 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 |145| 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 |146| 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 |147| Configure WebSocket support in Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/how-to-websockets-gateway-api |148| Configure ALB Service Mesh extension via Helm chart | 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| Enable and configure HTTP/3 over QUIC in Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/http3-quic-support |152| 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 |153| Configure Azure Application Gateway Ingress Controller annotations | https://learn.microsoft.com/en-us/azure/application-gateway/ingress-controller-annotations |154| Configure cookie-based session affinity with Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/ingress-controller-cookie-affinity |155| 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 |156| Expose WebSocket servers through Application Gateway with AGIC | https://learn.microsoft.com/en-us/azure/application-gateway/ingress-controller-expose-websocket-server |157| Enable multi-namespace support in Application Gateway Ingress Controller | https://learn.microsoft.com/en-us/azure/application-gateway/ingress-controller-multiple-namespace-support |158| Use private IPs for internal ingress routing with AGIC | https://learn.microsoft.com/en-us/azure/application-gateway/ingress-controller-private-ip |159| Monitor Azure Application Gateway with Azure Monitor | https://learn.microsoft.com/en-us/azure/application-gateway/monitor-application-gateway |160| Reference monitoring metrics and logs for Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/monitor-application-gateway-reference |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 on Application Gateway v2 | 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| Configure HTTP header rewrite rules in Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/add-http-header-rewrite-rule-powershell |177| Integrate Key Vault certificates with Application Gateway via PowerShell | https://learn.microsoft.com/en-us/azure/application-gateway/configure-keyvault-ps |178| Configure request mirroring with Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/how-to-request-mirroring-gateway-api |179| Integrate App Gateway for Containers with Prometheus and Grafana | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/prometheus-grafana |180| 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 |181| Autoscale AKS pods using Application Gateway metrics | https://learn.microsoft.com/en-us/azure/application-gateway/ingress-controller-autoscale-pods |182183### Deployment184| Topic | URL |185|-------|-----|186| Configure externally managed scheduled autoscaling for Application Gateway v2 | https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-externally-managed-scheduled-autoscaling |187| Deploy Azure Application Gateway Basic via portal | https://learn.microsoft.com/en-us/azure/application-gateway/deploy-basic-portal |188| Disable and re-enable AGIC add-on on AKS clusters | https://learn.microsoft.com/en-us/azure/application-gateway/ingress-controller-disable-addon |189| Deploy AGIC using an existing Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/ingress-controller-install-existing |190| Deploy AGIC with a new Application Gateway instance | https://learn.microsoft.com/en-us/azure/application-gateway/ingress-controller-install-new |191| Migrate AGIC from Helm deployment to AKS add-on | https://learn.microsoft.com/en-us/azure/application-gateway/ingress-controller-migration |192| Upgrade Application Gateway Ingress Controller using Helm | https://learn.microsoft.com/en-us/azure/application-gateway/ingress-controller-update-ingress-controller |193| ARM template for Application Gateway IPv6 frontend | https://learn.microsoft.com/en-us/azure/application-gateway/ipv6-application-gateway-arm-template |194| Deploy Application Gateway IPv6 frontend with PowerShell | https://learn.microsoft.com/en-us/azure/application-gateway/ipv6-application-gateway-powershell |195| 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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