Domain Due Diligence
Report for Guide.duo.com
Why we think so?
guide.duo.com is an official documentation and support site for Duo Security's authentication services, widely used for two-factor authentication. It receives moderate monthly traffic (~265,000 visits in October 2025), primarily from the US and other countries including Ghana, Canada, and India. The site is not transactional and does not facilitate payments or sensitive exchanges directly. There are no reports or credible claims of guide.duo.com being used as a scam or fraudulent site. However, Duo's authentication system is sometimes targeted by phishing attacks that trick users into approving unauthorized access via Duo push notifications, which may result in account compromise and external financial fraud, but not due to any fault of this site. The domain has a valid SSL certificate and good web reputation with no listing on blacklists or security warnings.
Risk Insights
Official Duo Documentation Site
- Valid SSL and standard DNS setup
- Steady, legitimate monthly traffic
- No detected malware or phishing
Target of Phishing, Not Source
- Phishing scams exploit Duo's authentication flows
- Guide.duo.com is not involved in scams
- Users should stay vigilant with authentication requests
Contradictory Signals
Phishing attacks exploit Duo methods but do not implicate this official documentation domain
Signal A: No direct scam or fraud implicating guide.duo.com
Signal B: Reports of phishing targeting Duo authentication
Category Scores
Red Flags & Warnings
- Phishing scams target Duo authentication methods but do not involve guide.duo.com directly.
🔎 Detailed Checks & Analysis
Domain and Infrastructure Validity
Score: 90/100
Domain and Infrastructure Validity
"The SSL cert issued recently with RSA-SHA256 signature supports secure communication."
Reason: Valid SSL certificate and normal DNS records confirm domain legitimacy.
Reputation and Traffic Analysis
Score: 85/100
Reputation and Traffic Analysis
"Bounce rate is typical for help/documentation sites; high direct and search traffic ratios suggest legitimate use."
Reason: Moderate, steady traffic mainly from the US with no signs of suspicious spikes.
Blacklist and Security Threat Status
Score: 100/100
Blacklist and Security Threat Status
"Site appears safe with no detected malware or phishing flags in security databases."
Reason: No listings on Google Safe Browsing or crypto scam blacklists.
Content Authenticity and Branding
Score: 85/100
Content Authenticity and Branding
"USPTO trademark checks confirm Duo branding ownership unrelated to scams."
Reason: Content matches official Duo documentation style and duplicated on known trusted sites.
User Reviews and Scam Reports
Score: 80/100
User Reviews and Scam Reports
"Reports of Duo system phishing scams exist but do not implicate this domain directly."
Reason: No credible scam or fraud reviews found for guide.duo.com.
Legal and Customer Disputes
Score: 75/100
Legal and Customer Disputes
"Duo Security maintains standard legal frameworks but no disputes linked to this site."
Reason: No known legal issues or customer disputes involving guide.duo.com domain.
Your Next Steps
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1
Use guide.duo.com solely for official Duo Security documentation and support.
-
2
Always verify Duo authentication requests independently before approving to avoid phishing.
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3
Avoid entering Duo codes or approving push notifications you did not expect.
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4
Report suspicious Duo authentication prompts to your organization's IT security team.
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5
Keep software and security systems updated to protect against phishing and social engineering.
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6
Access the site via direct URLs or trusted links to prevent visiting spoofed pages.
Evidence & Citations
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Guide to Duo Authentication - Official Documentation
Official help and documentation site for Duo Security.
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Duo Security Phishing Alerts and Best Practices
Phishing scams exploit Duo authentication but not guide.duo.com.
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SimilarWeb Traffic and Engagement Report for guide.duo.com
Shows steady traffic from US, Canada, and India with low risk signals.
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Google Safe Browsing Lookup
No malware or phishing risks detected for guide.duo.com.
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WHOIS and SSL Certificate Check for guide.duo.com
Valid SSL certificate issued and no suspicious DNS setup.
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