1---2name: azure-nat-gateway3description: Expert knowledge for Azure NAT Gateway development including troubleshooting, best practices, decision making, architecture & design patterns, limits & quotas, security, configuration, and deployment. Use when planning SNAT ports, analyzing flow logs, deploying NAT Gateway V2, migrating Standard→V2, or securing outbound IPs, and other Azure NAT Gateway related development tasks. Not for Azure Virtual Network (use azure-virtual-network), Azure Virtual Network Manager (use azure-virtual-network-manager), Azure Load Balancer (use azure-load-balancer), Azure Firewall (use azure-firewall).4---5# Azure NAT Gateway Skill
6
7This 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.
8
9## How to Use This Skill
10
11> **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
12
13> **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)
14
15This 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.
18
19## Category Index
20
21| Category | Lines | Description |
22|----------|-------|-------------|
23| Troubleshooting | L36-L40 | Using NAT Gateway flow logs to monitor traffic, detect connectivity issues, analyze failures, and troubleshoot network/NAT behavior in Azure. |
24| Best Practices | L41-L45 | Guidance on reducing SNAT port exhaustion and optimizing outbound connectivity patterns when using Azure NAT Gateway. |
25| 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. |
26| 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. |
27| Limits & Quotas | L56-L61 | SNAT limits, port allocation, scaling behavior, and guidance for planning NAT Gateway SNAT capacity, especially when used with Azure Firewall. |
28| 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. |
29| Configuration | L67-L74 | Monitoring and configuring NAT Gateway V2: metrics, alerts, flow logs, and deployment via ARM, Bicep, or Terraform. |
30| 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. |
31
32### Troubleshooting
33| Topic | URL |
34|-------|-----|
35| Monitor and troubleshoot with NAT Gateway flow logs | https://learn.microsoft.com/en-us/azure/nat-gateway/monitor-nat-gateway-flow-logs |
36
37### Best Practices
38| Topic | URL |
39|-------|-----|
40| Optimize SNAT usage with Azure NAT Gateway | https://learn.microsoft.com/en-us/azure/nat-gateway/nat-gateway-snat |
41
42### Decision Making
43| Topic | URL |
44|-------|-----|
45| Choose between Azure NAT Gateway Standard SKUs | https://learn.microsoft.com/en-us/azure/nat-gateway/nat-sku |
46
47### Architecture & Design Patterns
48| Topic | URL |
49|-------|-----|
50| Design Azure virtual networks with NAT Gateway | https://learn.microsoft.com/en-us/azure/nat-gateway/nat-gateway-design |
51
52### Limits & Quotas
53| Topic | URL |
54|-------|-----|
55| Azure NAT Gateway FAQs on limits and behavior | https://learn.microsoft.com/en-us/azure/nat-gateway/faq |
56| Plan SNAT capacity with NAT Gateway and Azure Firewall | https://learn.microsoft.com/en-us/azure/nat-gateway/tutorial-hub-spoke-nat-firewall |
57
58### Security
59| Topic | URL |
60|-------|-----|
61| Apply security best practices to Azure NAT Gateway | https://learn.microsoft.com/en-us/azure/nat-gateway/secure-nat-gateway |
62
63### Configuration
64| Topic | URL |
65|-------|-----|
66| Reference monitoring metrics and logs for NAT Gateway | https://learn.microsoft.com/en-us/azure/nat-gateway/monitor-nat-gateway-reference |
67| Configure StandardV2 NAT Gateway flow logging | https://learn.microsoft.com/en-us/azure/nat-gateway/nat-gateway-flow-logs |
68| Configure metrics and alerts for Azure NAT Gateway | https://learn.microsoft.com/en-us/azure/nat-gateway/nat-metrics |
69| Deploy NAT Gateway V2 using ARM, Bicep, or Terraform | https://learn.microsoft.com/en-us/azure/nat-gateway/quickstart-create-nat-gateway-v2-templates |
70
71### Deployment
72| Topic | URL |
73|-------|-----|
74| Migrate Azure NAT Gateway Standard to StandardV2 | https://learn.microsoft.com/en-us/azure/nat-gateway/nat-gateway-v2-migrate |
75| Redeploy NAT gateway after cross-region resource moves | https://learn.microsoft.com/en-us/azure/nat-gateway/region-move-nat-gateway |
76| Move VM public IP outbound traffic to NAT Gateway | https://learn.microsoft.com/en-us/azure/nat-gateway/tutorial-migrate-ilip-nat |
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