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azure-firewall

Expert knowledge for Azure Firewall development including troubleshooting, best practices, decision making, architecture & design patterns, limits & quotas, security, configuration, integrations & coding patterns, and deployment. Use when configuring Azure Firewall rules, DNS proxy, TLS inspection, hub-spoke routing, or DNAT/SNAT behavior, and other Azure Firewall related development tasks. Not for Azure Web Application Firewall (use azure-web-application-firewall), Azure Firewall Manager (use azure-firewall-manager), Azure Virtual Network (use azure-virtual-network), Azure Virtual WAN (use azure-virtual-wan).

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SKILL.md (original)

Review the instructions the agent will receive before you install.

Azure Firewall Skill

This skill provides expert guidance for Azure Firewall. 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.

How to Use This Skill

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 file

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

This skill requires network access to fetch documentation content:

  • Preferred: Use mcp_microsoftdocs:microsoft_docs_fetch with query string from=learn-agent-skill. Returns Markdown.
  • Fallback: Use fetch_webpage with query string from=learn-agent-skill&accept=text/markdown. Returns Markdown.

Category Index

CategoryLinesDescription
TroubleshootingL37-L42Diagnosing Azure Firewall issues using known limitations, packet captures, and Sentinel log analysis for malware detection and traffic investigation.
Best PracticesL43-L48Best practices for Azure Firewall DNS proxy/caching, rule and SNAT tuning, using Policy Analytics to refine rules, and hardening firewall security and configuration
Decision MakingL49-L56Guidance on selecting the right Azure Firewall SKU (Basic/Standard/Premium) using features, performance benchmarks, and deployment steps for Basic with portal and policy.
Architecture & Design PatternsL57-L67Design patterns for Azure Firewall deployment: hub-spoke routing, forced tunneling, SLB integration, management NIC use, AVD/M365 protection, and DNAT for overlapping private networks.
Limits & QuotasL68-L76Configuring Azure Firewall capacity, SNAT port scaling (with multiple public IPs and NAT Gateway/V2), and tuning limits like prescaling ranges and TCP session idle timeouts.
SecurityL77-L90Configuring Azure Firewall for secure deployments: policies, roles/access, TLS inspection and CA certs, threat intelligence, DNAT, hybrid/AKS protection, and best-practice security hardening.
ConfigurationL91-L112Configuring Azure Firewall behavior: rules, IP groups, DNS, HTTP headers, SNAT/DNAT, IPv6, FTP/SQL, maintenance windows, logging/monitoring, and advanced Premium features.
Integrations & Coding PatternsL113-L117Configuring Azure Firewall to securely access Azure Storage via SFTP, including required rules, network paths, and integration patterns for SFTP traffic.
DeploymentL118-L126Guides for deploying Azure Firewall (Standard/Premium) with Bicep, ARM, Terraform, changing SKUs, and integrating with IP Groups and Azure DDoS Protection.

Troubleshooting

TopicURL
Detect and investigate malware using Sentinel with Azure Firewall logshttps://learn.microsoft.com/en-us/azure/firewall/detect-malware-with-sentinel
Troubleshoot Azure Firewall using packet capturehttps://learn.microsoft.com/en-us/azure/firewall/packet-capture

Best Practices

TopicURL
Understand Azure Firewall DNS proxy behavior and cachinghttps://learn.microsoft.com/en-us/azure/firewall/dns-details
Optimize Azure Firewall performance with rule and SNAT tuninghttps://learn.microsoft.com/en-us/azure/firewall/firewall-best-practices

Decision Making

TopicURL
Select the appropriate Azure Firewall SKUhttps://learn.microsoft.com/en-us/azure/firewall/choose-firewall-sku
Deploy Azure Firewall Basic with portal and policyhttps://learn.microsoft.com/en-us/azure/firewall/deploy-firewall-basic-portal-policy
Choose the right Azure Firewall SKU by featureshttps://learn.microsoft.com/en-us/azure/firewall/features-by-sku
Choose Azure Firewall SKU based on performance benchmarkshttps://learn.microsoft.com/en-us/azure/firewall/firewall-performance

Architecture & Design Patterns

TopicURL
Design multi-hub and spoke routing with Azure Firewallhttps://learn.microsoft.com/en-us/azure/firewall/firewall-multi-hub-spoke
Design Azure Firewall forced tunneling architectureshttps://learn.microsoft.com/en-us/azure/firewall/forced-tunneling
Design Azure Firewall with Standard Load Balancerhttps://learn.microsoft.com/en-us/azure/firewall/integrate-lb
Use Azure Firewall Management NIC for control traffichttps://learn.microsoft.com/en-us/azure/firewall/management-nic
Architect Azure Firewall protection for Azure Virtual Desktophttps://learn.microsoft.com/en-us/azure/firewall/protect-azure-virtual-desktop
Design Azure Firewall protection for Microsoft 365 traffichttps://learn.microsoft.com/en-us/azure/firewall/protect-office-365
Use private IP DNAT for overlapped Azure networkshttps://learn.microsoft.com/en-us/azure/firewall/tutorial-private-ip-dnat

Limits & Quotas

TopicURL
Deploy Azure Firewall with multiple public IPs and limitshttps://learn.microsoft.com/en-us/azure/firewall/deploy-multi-public-ip-powershell
Scale Azure Firewall SNAT ports with NAT Gatewayhttps://learn.microsoft.com/en-us/azure/firewall/integrate-with-nat-gateway
Integrate Azure Firewall with NAT Gateway V2 for SNAT scalinghttps://learn.microsoft.com/en-us/azure/firewall/integrate-with-nat-gateway-v2
Configure Azure Firewall prescaling capacity rangeshttps://learn.microsoft.com/en-us/azure/firewall/prescaling
Configure Azure Firewall TCP session idle timeoutshttps://learn.microsoft.com/en-us/azure/firewall/tcp-session-behavior

Security

TopicURL
Enforce Azure Firewall security using Azure Policyhttps://learn.microsoft.com/en-us/azure/firewall/firewall-azure-policy
Configure TLS inspection certificates for Firewall Premiumhttps://learn.microsoft.com/en-us/azure/firewall/premium-certificates
Configure Enterprise CA certificates for Firewall Premium TLShttps://learn.microsoft.com/en-us/azure/firewall/premium-deploy-certificates-enterprise-ca
Protect AKS clusters using Azure Firewallhttps://learn.microsoft.com/en-us/azure/firewall/protect-azure-kubernetes-service
Azure Firewall roles, permissions, and required accesshttps://learn.microsoft.com/en-us/azure/firewall/roles-permissions
Apply security best practices to Azure Firewallhttps://learn.microsoft.com/en-us/azure/firewall/secure-firewall
Configure Azure Firewall threat intelligence filteringhttps://learn.microsoft.com/en-us/azure/firewall/threat-intel
Deploy and configure Azure Firewall in portalhttps://learn.microsoft.com/en-us/azure/firewall/tutorial-firewall-deploy-portal
Configure Azure Firewall DNAT for inbound filteringhttps://learn.microsoft.com/en-us/azure/firewall/tutorial-firewall-dnat
Configure Azure Firewall for hybrid network securityhttps://learn.microsoft.com/en-us/azure/firewall/tutorial-hybrid-portal

Configuration

TopicURL
Configure HTTP header insertion in Azure Firewallhttps://learn.microsoft.com/en-us/azure/firewall/configure-http-header-insertion
Create and manage Azure Firewall IP Groupshttps://learn.microsoft.com/en-us/azure/firewall/create-ip-group
Set customer-controlled maintenance windows for Azure Firewallhttps://learn.microsoft.com/en-us/azure/firewall/customer-controlled-maintenance
Configure Azure Firewall dual stack IPv4/IPv6 modehttps://learn.microsoft.com/en-us/azure/firewall/deploy-dual-stack-firewall
Bulk manage Azure Firewall rules with PowerShellhttps://learn.microsoft.com/en-us/azure/firewall/deploy-rules-powershell
Configure DNS servers and DNS proxy for Azure Firewallhttps://learn.microsoft.com/en-us/azure/firewall/dns-settings
Use Azure Firewall Policy Draft and Deploymenthttps://learn.microsoft.com/en-us/azure/firewall/draft-deploy
Analyze Azure Firewall data using workbookshttps://learn.microsoft.com/en-us/azure/firewall/firewall-workbook
Use Azure Firewall FQDN tags in application ruleshttps://learn.microsoft.com/en-us/azure/firewall/fqdn-tags
Configure FTP modes and security on Azure Firewallhttps://learn.microsoft.com/en-us/azure/firewall/ftp-support
Configure and use IP Groups in Azure Firewall ruleshttps://learn.microsoft.com/en-us/azure/firewall/ip-groups
Configure and analyze Azure Firewall monitoring logshttps://learn.microsoft.com/en-us/azure/firewall/monitor-firewall
Reference Azure Firewall monitoring logs and metricshttps://learn.microsoft.com/en-us/azure/firewall/monitor-firewall-reference
Implement Azure Firewall Premium advanced featureshttps://learn.microsoft.com/en-us/azure/firewall/premium-features
Track Azure Firewall rule changes with Resource Graphhttps://learn.microsoft.com/en-us/azure/firewall/rule-set-change-tracking
Configure SNAT private IP ranges in Azure Firewallhttps://learn.microsoft.com/en-us/azure/firewall/snat-private-range
Configure Azure Firewall application rules with SQL FQDNshttps://learn.microsoft.com/en-us/azure/firewall/sql-fqdn-filtering
Configure Azure Firewall DNAT policy for inbound traffichttps://learn.microsoft.com/en-us/azure/firewall/tutorial-firewall-dnat-policy

Integrations & Coding Patterns

TopicURL
Access Azure Storage via SFTP through Azure Firewallhttps://learn.microsoft.com/en-us/azure/firewall/firewall-sftp

Deployment

TopicURL
Change Azure Firewall Standard and Premium SKUshttps://learn.microsoft.com/en-us/azure/firewall/change-sku
Deploy and configure Azure Firewall Premium environmentshttps://learn.microsoft.com/en-us/azure/firewall/premium-deploy
Deploy Azure Firewall and IP Groups using Bicephttps://learn.microsoft.com/en-us/azure/firewall/quick-create-ipgroup-bicep
Deploy Azure Firewall and IP Groups via ARM templatehttps://learn.microsoft.com/en-us/azure/firewall/quick-create-ipgroup-template
Deploy Azure Firewall and IP Groups using Terraformhttps://learn.microsoft.com/en-us/azure/firewall/quick-create-ipgroup-terraform
Deploy Azure Firewall with Azure DDoS Protectionhttps://learn.microsoft.com/en-us/azure/firewall/tutorial-protect-firewall-ddos

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