What Is cf-qualys-scanner?
cf-qualys-scanner is a cloud-based web application security scanner that provides automated crawling and vulnerability testing to identify security flaws including XSS, SQL injection, and OWASP Top 10 vulnerabilities. You can see how often cf-qualys-scanner visits your website by setting up Dark Visitors Agent Analytics.
Agent Type
Expected Behavior
Security scanners probe websites for vulnerabilities, malware, configuration issues, and other threats. Scan frequency varies widely. Some services run continuous monitoring with daily or hourly checks, while others perform one-time or periodic assessments. Scans may target specific endpoints or comprehensively test multiple pages and functionalities depending on what exactly is being scanned and the site's risk profile.
Detail
| Operated By | Qualys |
| Last Updated | 21 hours ago |
Top Website Robots.txts
Country of Origin
Top Website Blocking Trend Over Time
The percentage of the world's top 1000 websites who are blocking cf-qualys-scanner
Overall Security Scanner Traffic
The percentage of all internet traffic coming from security scanners
Robots.txt
In this example, all pages are blocked. You can customize which pages are off-limits by swapping out / for a different disallowed path.
User-agent: cf-qualys-scanner # https://darkvisitors.com/agents/cf-qualys-scanner
Disallow: /Frequently Asked Questions About cf-qualys-scanner
Should I Block cf-qualys-scanner?
Generally no. Security scanners help identify vulnerabilities and protect the broader web ecosystem. Many scanners report findings directly to website owners, providing free security assessments. Only block them if they're too aggressive or you already have comprehensive security monitoring.
How Do I Block cf-qualys-scanner?
If you want to, you can block or limit cf-qualys-scanner's access by configuring user agent token rules in your robots.txt file. The best way to do this is using Automatic Robots.txt, which blocks all agents of this type and updates continuously as new agents are released. While the vast majority of agents operated by reputable companies honor these robots.txt directives, bad actors may choose to ignore them entirely. In that case, you'll need to implement alternative blocking methods such as firewall rules or server-level restrictions. You can verify whether cf-qualys-scanner is respecting your rules by setting up Agent Analytics to monitor its visits to your website.
Will Blocking cf-qualys-scanner Hurt My SEO?
Blocking security scanners won't directly affect SEO rankings, but it could indirectly impact your site's security posture. Compromised websites often face search engine penalties or warnings. Security scanners help identify vulnerabilities, so blocking them might increase your risk exposure.
Does cf-qualys-scanner Access Private Content?
Security scanners may probe both public and private areas to identify vulnerabilities. Some focus only on publicly accessible pages, while others may attempt to access login pages, administrative interfaces, API endpoints, and other potentially sensitive areas. The scope depends on the scanner's configuration and whether it's been authorized to test protected resources.
How Can I Tell if cf-qualys-scanner Is Visiting My Website?
Setting up Agent Analytics will give you realtime visibility into cf-qualys-scanner visiting your website, along with hundreds of other AI agents, crawlers, and scrapers. This will also let you measure human traffic to your website coming from AI search and chat LLM platforms like ChatGPT, Perplexity, and Gemini.
Why Is cf-qualys-scanner Visiting My Website?
cf-qualys-scanner may have targeted your site as part of internet-wide security scanning, through automated discovery of your domain, or because your site was specifically submitted for security assessment. Your site could also be included in regular monitoring if you use their security services.
How Can I Authenticate Visits From cf-qualys-scanner?
Agent Analytics authenticates agent visits from many agents, letting you know whether each one was actually from that agent, or spoofed by a bad actor. This helps you identify suspicious traffic patterns and make informed decisions about blocking or allowing specific user agents.