How do I install the Azure External Attack Surface Management skill?

Run npx skillmds@latest add atc-net/azure-external-attack-surface-management in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Azure External Attack Surface Management safe to use?

This skill has not completed SkillMD's automated safety review yet. Independent scanners report: SkillSpector: PASS, Skill Scanner: PASS. Capability flags: makes network calls. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Azure External Attack Surface Management?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Azure External Attack Surface Management free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Azure External Attack Surface Management?

atc-net (@atc-net) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Azure External Attack Surface Management by atc-net

Name: Azure External Attack Surface Management
Rating: 4.2 (5 reviews)
Author: atc-net

Azure External Attack Surface Management

Expert knowledge for Azure External Attack Surface Management development including limits & quotas, and configuration. Use when defining EASM asset filters, building inventory queries, or managing billable asset usage and quotas, and other Azure External Attack Surface Management related development tasks. Not for Azure Defender For Cloud (use azure-defender-for-cloud), Azure Security (use azure-security), Azure Sentinel (use azure-sentinel), Azure Firewall Manager (use azure-firewall-manager).

atc-net Updated Sep 8, 2026 3 repo stars

File contents

Azure External Attack Surface Management Skill

This skill provides expert guidance for Azure External Attack Surface Management. Covers limits & quotas, and configuration. 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

This skill requires network access to fetch documentation content:

Preferred: Use mcp_microsoftdocs:microsoft_docs_fetch. Returns Markdown.
Fallback: Use WebFetch. Returns Markdown.

Category Index

Category	Lines	Description
Limits & Quotas	L26-L30	Details on Defender EASM billable asset limits, how usage is measured, and how billing and quotas work for external attack surface management.
Configuration	L31-L43	Configuring Defender EASM asset filters (domains, hosts, IPs, ASNs, SSL certs, pages, contacts), using inventory filters/saved queries, and connecting EASM data to Log Analytics/ADX.

Limits & Quotas

Topic	URL
Understand Defender EASM billable asset limits and billing	https://learn.microsoft.com/en-us/azure/external-attack-surface-management/understanding-billable-assets

Configuration

Topic	URL
Configure ASN asset filters in Defender EASM	https://learn.microsoft.com/en-us/azure/external-attack-surface-management/asn-asset-filters
Configure contact asset filters in Defender EASM	https://learn.microsoft.com/en-us/azure/external-attack-surface-management/contact-asset-filters
Configure Defender EASM data connections to Log Analytics and ADX	https://learn.microsoft.com/en-us/azure/external-attack-surface-management/data-connections
Configure domain asset filters in Defender EASM	https://learn.microsoft.com/en-us/azure/external-attack-surface-management/domain-asset-filters
Configure host asset filters in Defender EASM	https://learn.microsoft.com/en-us/azure/external-attack-surface-management/host-asset-filters
Use Defender EASM inventory filters and saved queries	https://learn.microsoft.com/en-us/azure/external-attack-surface-management/inventory-filters
Configure IP address asset filters in Defender EASM	https://learn.microsoft.com/en-us/azure/external-attack-surface-management/ip-address-asset-filters
Configure IP block asset filters in Defender EASM	https://learn.microsoft.com/en-us/azure/external-attack-surface-management/ip-block-asset-filters
Configure page asset filters in Defender EASM	https://learn.microsoft.com/en-us/azure/external-attack-surface-management/page-asset-filters
Configure SSL certificate asset filters in Defender EASM	https://learn.microsoft.com/en-us/azure/external-attack-surface-management/ssl-certificate-asset-filters

---name: azure-external-attack-surface-managementdescription: Expert knowledge for Azure External Attack Surface Management development including limits & quotas, and configuration. Use when defining EASM asset filters, building inventory queries, or managing billable asset usage and quotas, and other Azure External Attack Surface Management related development tasks. Not for Azure Defender For Cloud (use azure-defender-for-cloud), Azure Security (use azure-security), Azure Sentinel (use azure-sentinel), Azure Firewall Manager (use azure-firewall-manager).---# Azure External Attack Surface Management SkillThis skill provides expert guidance for Azure External Attack Surface Management. Covers limits & quotas, and configuration. 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 fileThis skill requires **network access** to fetch documentation content:- **Preferred**: Use `mcp_microsoftdocs:microsoft_docs_fetch`. Returns Markdown.- **Fallback**: Use `WebFetch`. Returns Markdown.## Category Index| Category | Lines | Description ||----------|-------|-------------|| Limits & Quotas | L26-L30 | Details on Defender EASM billable asset limits, how usage is measured, and how billing and quotas work for external attack surface management. || Configuration | L31-L43 | Configuring Defender EASM asset filters (domains, hosts, IPs, ASNs, SSL certs, pages, contacts), using inventory filters/saved queries, and connecting EASM data to Log Analytics/ADX. |### Limits & Quotas| Topic | URL ||-------|-----|| Understand Defender EASM billable asset limits and billing | https://learn.microsoft.com/en-us/azure/external-attack-surface-management/understanding-billable-assets |### Configuration| Topic | URL ||-------|-----|| Configure ASN asset filters in Defender EASM | https://learn.microsoft.com/en-us/azure/external-attack-surface-management/asn-asset-filters || Configure contact asset filters in Defender EASM | https://learn.microsoft.com/en-us/azure/external-attack-surface-management/contact-asset-filters || Configure Defender EASM data connections to Log Analytics and ADX | https://learn.microsoft.com/en-us/azure/external-attack-surface-management/data-connections || Configure domain asset filters in Defender EASM | https://learn.microsoft.com/en-us/azure/external-attack-surface-management/domain-asset-filters || Configure host asset filters in Defender EASM | https://learn.microsoft.com/en-us/azure/external-attack-surface-management/host-asset-filters || Use Defender EASM inventory filters and saved queries | https://learn.microsoft.com/en-us/azure/external-attack-surface-management/inventory-filters || Configure IP address asset filters in Defender EASM | https://learn.microsoft.com/en-us/azure/external-attack-surface-management/ip-address-asset-filters || Configure IP block asset filters in Defender EASM | https://learn.microsoft.com/en-us/azure/external-attack-surface-management/ip-block-asset-filters || Configure page asset filters in Defender EASM | https://learn.microsoft.com/en-us/azure/external-attack-surface-management/page-asset-filters || Configure SSL certificate asset filters in Defender EASM | https://learn.microsoft.com/en-us/azure/external-attack-surface-management/ssl-certificate-asset-filters |

Frequently asked questions