azure-nat-gateway

Azure NAT Gateway Skill

This skill provides expert guidance for Azure NAT Gateway. Covers troubleshooting, best practices, decision making, architecture & design patterns, limits & quotas, security, configuration, 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

| Category | Lines | Description |

|----------|-------|-------------|

| Troubleshooting | L36-L40 | Using NAT Gateway flow logs to monitor traffic, detect connectivity issues, analyze failures, and troubleshoot network/NAT behavior in Azure. |

| Best Practices | L41-L45 | Guidance on reducing SNAT port exhaustion and optimizing outbound connectivity patterns when using Azure NAT Gateway. |

| Decision Making | L46-L50 | Guidance on choosing NAT Gateway Standard vs StandardV2 SKUs and step-by-step migration of existing outbound access and gateways to StandardV2. |

| Architecture & Design Patterns | L51-L55 | Designing VNETs with NAT Gateway, choosing patterns for outbound connectivity, and scaling/combining NAT Gateway with Azure Firewall for secure, high-throughput egress traffic. |

| Limits & Quotas | L56-L61 | SNAT limits, port allocation, scaling behavior, and guidance for planning NAT Gateway SNAT capacity, especially when used with Azure Firewall. |

| Security | L62-L66 | Security best practices for NAT Gateway: hardening design, minimizing exposure, managing outbound IPs, monitoring traffic, and integrating with NSGs, firewalls, and other Azure security controls. |

| Configuration | L67-L74 | Monitoring and configuring NAT Gateway V2: metrics, alerts, flow logs, and deployment via ARM, Bicep, or Terraform. |

| Deployment | L75-L80 | Guides for deploying and updating NAT Gateway: migrating Standard→StandardV2, redeploying after cross-region moves, and rerouting VM outbound traffic from public IPs to NAT Gateway. |

Troubleshooting

| Topic | URL |

|-------|-----|

| Monitor and troubleshoot with NAT Gateway flow logs | https://learn.microsoft.com/en-us/azure/nat-gateway/monitor-nat-gateway-flow-logs |

Best Practices

| Topic | URL |

|-------|-----|

| Optimize SNAT usage with Azure NAT Gateway | https://learn.microsoft.com/en-us/azure/nat-gateway/nat-gateway-snat |

Decision Making

| Topic | URL |

|-------|-----|

| Choose between Azure NAT Gateway Standard SKUs | https://learn.microsoft.com/en-us/azure/nat-gateway/nat-sku |

Architecture & Design Patterns

| Topic | URL |

|-------|-----|

| Design Azure virtual networks with NAT Gateway | https://learn.microsoft.com/en-us/azure/nat-gateway/nat-gateway-design |

Limits & Quotas

| Topic | URL |

|-------|-----|

| Azure NAT Gateway FAQs on limits and behavior | https://learn.microsoft.com/en-us/azure/nat-gateway/faq |

| Plan SNAT capacity with NAT Gateway and Azure Firewall | https://learn.microsoft.com/en-us/azure/nat-gateway/tutorial-hub-spoke-nat-firewall |

Security

| Topic | URL |

|-------|-----|

| Apply security best practices to Azure NAT Gateway | https://learn.microsoft.com/en-us/azure/nat-gateway/secure-nat-gateway |

Configuration

| Topic | URL |

|-------|-----|

| Reference monitoring metrics and logs for NAT Gateway | https://learn.microsoft.com/en-us/azure/nat-gateway/monitor-nat-gateway-reference |

| Configure StandardV2 NAT Gateway flow logging | https://learn.microsoft.com/en-us/azure/nat-gateway/nat-gateway-flow-logs |

| Configure metrics and alerts for Azure NAT Gateway | https://learn.microsoft.com/en-us/azure/nat-gateway/nat-metrics |

| Deploy NAT Gateway V2 using ARM, Bicep, or Terraform | https://learn.microsoft.com/en-us/azure/nat-gateway/quickstart-create-nat-gateway-v2-templates |

Deployment

| Topic | URL |

|-------|-----|

| Migrate Azure NAT Gateway Standard to StandardV2 | https://learn.microsoft.com/en-us/azure/nat-gateway/nat-gateway-v2-migrate |

| Redeploy NAT gateway after cross-region resource moves | https://learn.microsoft.com/en-us/azure/nat-gateway/region-move-nat-gateway |

| Move VM public IP outbound traffic to NAT Gateway | https://learn.microsoft.com/en-us/azure/nat-gateway/tutorial-migrate-ilip-nat |