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Agent skill

Configuring Multi Factor Authentication With Duo

by mukul975 in mukul975/Anthropic-Cybersecurity-Skills

Deploys Cisco Duo multi-factor authentication across enterprise applications, VPN, RDP, and SSH access points, covering Duo Authentication Proxy setup, adaptive authentication policies, device trust…

Apache-2.0Auto-check passedBackend & APIs

Install Configuring Multi Factor Authentication With Duo

skills CLI
$ npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill configuring-multi-factor-authentication-with-duo -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install mukul975/Anthropic-Cybersecurity-Skills configuring-multi-factor-authentication-with-duo --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/configuring-multi-factor-authentication-with-duo .claude/skills/configuring-multi-factor-authentication-with-duo && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
configuring-multi-factor-authentication-with-duo
GitHub stars
34k
Token cost
~1.6k tokens
SKILL.md length
727 words
Files
8 (incl. scripts, references, assets)
Skills in repo
644
Repo updated
First seen
Licence
Apache-2.0

At a glance

Deploys Cisco Duo multi-factor authentication across enterprise applications, VPN, RDP, and SSH access points, covering Duo Authentication Proxy setup, adaptive authentication policies, device trust…

  • Works in 6 steps: Duo Authentication Proxy Setup → VPN MFA Integration → RDP/Windows Logon MFA → …
  • Hardening MFA for remote access
  • SKILL.md covers Overview, When to Use, Prerequisites and Objectives, plus 5 more sections
  • Runs Python scripts from its folder

What it does

Configuring Multi Factor Authentication With Duo is an agent skill from mukul975/Anthropic-Cybersecurity-Skills. Deploys Cisco Duo multi-factor authentication across enterprise applications, VPN, RDP, and SSH access points, covering Duo Authentication Proxy setup, adaptive authentication policies, device trust assessment, and phishing-resistant WebAuthn/FIDO2 deployment aligned with NIST 800-63B AAL2/AAL3. Use when adding or hardening MFA for remote access, VPN, or privileged logins with Duo.

Its SKILL.md is about 1.6k tokens, which your agent loads only when the skill is triggered. The skill folder holds 10 other files, including scripts, reference files and assets (for example `assets/template.md`, `references/api-reference.md` and `references/standards.md`).

It sits in Backend & APIs, covering Authentication and Deployment. The repository describes itself as: 817 structured cybersecurity skills for AI agents · Mapped to 6 frameworks: MITRE ATT&CK, NIST CSF 2.0, MITRE ATLAS, D3FEND, NIST AI RMF & MITRE F3 (Fight Fraud) · agentskills.io…. The licence is Apache-2.0.

When your agent uses it

  • Hardening MFA for remote access
  • Privileged logins with Duo

Example prompts

  • “Use the configuring-multi-factor-authentication-with-duo skill to deploy Cisco Duo multi-factor authentication across enterprise applications, VPN…”
  • “/configuring-multi-factor-authentication-with-duo”

Requirements

  • Python 3

Workflow steps

6 steps, taken from the step headings in SKILL.md.

  1. Duo Authentication Proxy Setup
  2. VPN MFA Integration
  3. RDP/Windows Logon MFA
  4. Adaptive Policy Configuration
  5. Phishing-Resistant MFA Deployment
  6. Monitoring and Response

What it can do on your machine

Read from SKILL.md and the folder at commit 54a7988. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Ships 2 files in scripts/ (Python), which the agent can run.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Configuring Multi Factor Authentication With Duo loads about 1.6k tokens when it runs, and up to ~2.7k if it reads all its reference files. Until then it costs about 108 tokens; SKILL.md has 727 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~108
When it runs · the whole SKILL.md, loaded when a task matches
~1.6k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~2.7k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.

SKILL.md

The full file from mukul975/Anthropic-Cybersecurity-Skills at commit 54a7988, republished under its Apache-2.0 licence (© mukul975). 727 words, ~1,605 tokens.

Download SKILL.mdSave it as .claude/skills/configuring-multi-factor-authentication-with-duo/SKILL.md (or your agent's skills folder). This skill also uses 7 other files; get the full folder from GitHub.
name
configuring-multi-factor-authentication-with-duo
description
Deploys Cisco Duo multi-factor authentication across enterprise applications, VPN, RDP, and SSH access points, covering Duo Authentication Proxy setup, adaptive authentication policies, device trust assessment, and phishing-resistant WebAuthn/FIDO2 deployment aligned with NIST 800-63B AAL2/AAL3. Use when adding or hardening MFA for remote access, VPN, or privileged logins with Duo.
domain
cybersecurity
subdomain
identity-access-management
tags
iam, identity, access-control, authentication, mfa, duo, multi-factor
version
1.0
author
mahipal
license
Apache-2.0
nist_csf
PR.AA-01, PR.AA-02, PR.AA-05, PR.AA-06
mitre_attack
T1621, T1110.004, T1110.003, T1078, T1556.006

Configuring Multi-Factor Authentication with Duo

Overview

Deploy Cisco Duo multi-factor authentication across enterprise applications, VPN, RDP, and SSH access points. This skill covers Duo integration methods, adaptive authentication policies, device trust assessment, and phishing-resistant MFA deployment aligned with NIST 800-63B AAL2/AAL3 requirements.

When to Use

  • When deploying or configuring configuring multi factor authentication with duo capabilities in your environment
  • When establishing security controls aligned to compliance requirements
  • When building or improving security architecture for this domain
  • When conducting security assessments that require this implementation

Prerequisites

  • Familiarity with identity access management concepts and tools
  • Access to a test or lab environment for safe execution
  • Python 3.8+ with required dependencies installed
  • Appropriate authorization for any testing activities

Objectives

  • Configure Duo MFA for VPN, RDP, SSH, and web applications
  • Implement adaptive access policies based on user, device, and network context
  • Deploy phishing-resistant authentication (Duo Verified Push, WebAuthn)
  • Configure device health policies (trusted endpoints, OS version enforcement)
  • Set up Duo Admin Panel monitoring and reporting
  • Implement MFA bypass and emergency access procedures

Key Concepts

Duo Authentication Methods (by security strength)
  1. Security Keys (WebAuthn/FIDO2): Phishing-resistant, AAL3 capable
  2. Duo Verified Push: Requires code entry, resistant to MFA fatigue attacks
  3. Duo Push: Push notification to Duo Mobile app
  4. TOTP (Duo Mobile Passcode): Time-based one-time password
  5. Hardware Tokens: OTP from physical token
  6. SMS/Phone Call: Least secure, use only as fallback
Duo Integration Architecture
  • Duo Authentication Proxy: On-premises proxy for RADIUS/LDAP integration
  • Duo Web SDK: Embed Duo MFA in web applications
  • Duo OIDC/SAML: SSO integration for cloud applications
  • Duo for RDP: Windows Logon MFA
  • Duo Unix: PAM-based MFA for SSH
Adaptive Access Policies
  • Trusted Networks: Reduce MFA friction for corporate networks
  • Remembered Devices: Skip MFA for trusted devices (configurable duration)
  • Device Health: Block or require MFA based on OS patch level, encryption, firewall
  • Risk-Based Authentication: Step-up MFA for anomalous login patterns

Workflow

Step 1: Duo Authentication Proxy Setup
  1. Deploy Duo Authentication Proxy on Windows/Linux server
  2. Configure primary authentication (AD/LDAP or RADIUS)
  3. Configure Duo API credentials (Integration Key, Secret Key, API Hostname)
  4. Set failmode (safe=deny if Duo unreachable, secure=allow)
  5. Test proxy connectivity to Duo cloud and AD
Step 2: VPN MFA Integration
  1. Configure VPN concentrator for RADIUS authentication
  2. Point RADIUS to Duo Authentication Proxy
  3. Configure Duo proxy with [radius_server_auto] section
  4. Test VPN login with Duo Push
  5. Deploy to all VPN users with enrollment period
Step 3: RDP/Windows Logon MFA
  1. Install Duo Authentication for Windows Logon on target servers
  2. Configure Duo application in Admin Panel
  3. Set offline access options (allow N offline logins)
  4. Configure bypass for service accounts
  5. Test RDP login with Duo MFA
Show full SKILL.md (283 more words)Show less
Step 4: Adaptive Policy Configuration
  1. Create user groups (Standard, Privileged, Contractors)
  2. Configure per-group authentication policies:
    • Standard: Duo Push allowed, remembered device 7 days
    • Privileged: Verified Push required, no remembered device
    • Contractors: WebAuthn required, no remembered device
  3. Configure device health policies:
    • Require encrypted disk
    • Block outdated OS versions
    • Require firewall enabled
  4. Set trusted network exceptions for corporate IPs
Step 5: Phishing-Resistant MFA Deployment
  1. Enable Verified Push (requires entering 3-digit code from login screen)
  2. Register WebAuthn/FIDO2 security keys for privileged users
  3. Disable SMS and phone call for high-risk groups
  4. Configure Duo Risk-Based Factor Selection
  5. Monitor for MFA fatigue attack patterns
Step 6: Monitoring and Response
  1. Configure Duo Admin Panel alerts
  2. Set up authentication log forwarding to SIEM
  3. Monitor for: MFA denial patterns, bypass usage, new device enrollments
  4. Create incident response playbook for MFA compromise
  5. Regular review of bypass and exception policies

Security Controls

ControlNIST 800-53Description
MFAIA-2(1)Multi-factor authentication for network access
MFA for PrivilegedIA-2(2)MFA for privileged account access
Replay ResistanceIA-2(8)Replay-resistant authentication
Device IdentificationIA-3Device identity and trust
Authenticator ManagementIA-5MFA enrollment and lifecycle

Common Pitfalls

  • Not deploying phishing-resistant MFA (Verified Push/FIDO2) for privileged accounts
  • Setting failmode to "safe" (allow access when Duo is down) in production
  • Not disabling SMS/phone call for users with app-capable devices
  • Forgetting to configure offline access for laptops
  • Not monitoring for MFA fatigue/prompt bombing attacks

Verification

  • VPN login requires Duo MFA
  • RDP to servers requires Duo MFA
  • SSH access requires Duo MFA
  • Verified Push enabled for privileged users
  • Device health policy blocks non-compliant devices
  • Authentication logs forwarded to SIEM
  • Bypass/emergency access procedures tested
  • MFA fatigue detection alerts configured

© mukul975, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 7 other files (scripts, references, assets) in skills/configuring-multi-factor-authentication-with-duo of mukul975/Anthropic-Cybersecurity-Skills.

  • SKILL.md
  • LICENSE
  • assets/template.md
  • references/api-reference.md
  • references/standards.md
  • references/workflows.md
  • scripts/agent.py
  • scripts/process.py

Open the folder on GitHubat commit 54a7988

Compare with similar skills

Configuring Multi Factor Authentication With Duo next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Configuring Multi Factor Authentication With Duo compared with similar skills
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Granola Multi Env Setupjeremylongshore/tons-of-skills-marketplace2.8k—~2kAutomated safety check: PassMIT
Tanstack Start Best PracticesDeckardGer/tanstack-agent-skills222—~1kAutomated safety check: PassMIT
Access Protected Vercel Deploymentvercel/vercel-plugin301—~1.9kAutomated safety check: NotesCustom licence

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Categories

Questions about Configuring Multi Factor Authentication With Duo

What does Configuring Multi Factor Authentication With Duo do?

Deploys Cisco Duo multi-factor authentication across enterprise applications, VPN, RDP, and SSH access points, covering Duo Authentication Proxy setup, adaptive authentication policies, device trust…. Configuring Multi Factor Authentication With Duo is an agent skill from mukul975/Anthropic-Cybersecurity-Skills. Deploys Cisco Duo multi-factor authentication across enterprise applications, VPN, RDP, and SSH access points, covering Duo Authentication Proxy setup, adaptive authentication policies, device trust assessment, and phishing-resistant WebAuthn/FIDO2 deployment aligned with NIST 800-63B AAL2/AAL3.

When should I use Configuring Multi Factor Authentication With Duo?

Configuring Multi Factor Authentication With Duo fits situations like: hardening MFA for remote access; privileged logins with Duo.

How do I install Configuring Multi Factor Authentication With Duo in Claude Code?

Run `npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill configuring-multi-factor-authentication-with-duo -a claude-code`. Or copy the skill folder (skills/configuring-multi-factor-authentication-with-duo in mukul975/Anthropic-Cybersecurity-Skills) into .claude/skills/configuring-multi-factor-authentication-with-duo in your project. Claude Code loads it when a task matches its description.

How do I install Configuring Multi Factor Authentication With Duo in Codex?

Run `npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill configuring-multi-factor-authentication-with-duo -a codex`. Or copy the skill folder (skills/configuring-multi-factor-authentication-with-duo in mukul975/Anthropic-Cybersecurity-Skills) into .agents/skills/configuring-multi-factor-authentication-with-duo in your project. Codex loads it when a task matches its description.

Can I use Configuring Multi Factor Authentication With Duo in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill configuring-multi-factor-authentication-with-duo -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/configuring-multi-factor-authentication-with-duo, .gemini/skills/configuring-multi-factor-authentication-with-duo, .github/skills/configuring-multi-factor-authentication-with-duo and .opencode/skills/configuring-multi-factor-authentication-with-duo in your project.

What does Configuring Multi Factor Authentication With Duo need to run?

Going by SKILL.md and its folder, Configuring Multi Factor Authentication With Duo needs Python for the scripts in its folder. Our summary lists: Python 3.

Does Configuring Multi Factor Authentication With Duo access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Configuring Multi Factor Authentication With Duo safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.

What licence does Configuring Multi Factor Authentication With Duo use?

Configuring Multi Factor Authentication With Duo is published under the Apache-2.0 licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Configuring Multi Factor Authentication With Duo use?

About 1.6k tokens (SKILL.md is roughly 6.4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 1.1k tokens, read only when the agent opens those files.

What are the alternatives to Configuring Multi Factor Authentication With Duo?

Skills that share tags, products or a category with Configuring Multi Factor Authentication With Duo: Flow Nexus Platform (ruvnet/agentic-flow, 819 stars), Adobe Upgrade Migration (jeremylongshore/tons-of-skills-marketplace, 2.8k stars), Granola Multi Env Setup (jeremylongshore/tons-of-skills-marketplace, 2.8k stars) and Tanstack Start Best Practices (DeckardGer/tanstack-agent-skills, 222 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Configuring Multi Factor Authentication With Duo?

mukul975 (a GitHub user) maintains it in mukul975/Anthropic-Cybersecurity-Skills, which has 33,993 GitHub stars. The repository holds 644 skills in this directory. The repository was last updated on August 31, 2026.

Source: mukul975/Anthropic-Cybersecurity-Skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.