What is FastDAST?
FastDAST is a dynamic application security testing scanner by Black Duck that identifies vulnerabilities in APIs and web applications during development and production phases. Agent Analytics can track when it visits your website.
Category
Expected Behavior
FastDAST's pattern depends on who pointed it at you. Continuous monitoring services check daily or even hourly, while a one time assessment sweeps once and disappears. Expect requests aimed at login pages, admin paths, APIs, and configuration files, because exposed ones are what scanners exist to find.
Overview
| Operated By | Black Duck |
| Expected To Follow Robots.txt | Yes |
| Insights Last Updated | July 6, 2026 |
Robots.txt Blocked Percentage
Country of Origin
Robots.txt Blocking Trend
As of July 6, 2026, 0% of top websites block FastDAST in their robots.txt files.
Overall Security Scanner Traffic
As of July 6, 2026, 0.0% of all web traffic came from security scanners.
This data reflects agent visits measured across thousands of websites using Agent Analytics, combined with daily scans of the world's top 1000 websites and their robots.txt files.
How To Block FastDAST
Add this rule to your robots.txt file to block FastDAST from accessing your entire website. You can customize which pages are blocked by swapping out / for a different path.
User-agent: FastDAST # https://knownagents.com/agents/fastdast
Disallow: /Frequently Asked Questions
Should I Block FastDAST?
Not unless you already run your own scanning and want cleaner logs. FastDAST checks websites for exposed vulnerabilities, and some scanning services report what they find to site owners for free. Almost none of the top websites we track have robots.txt rules for FastDAST right now.
Does FastDAST Respect Robots.txt?
Yes. FastDAST is expected to honor robots.txt rules, so a disallow rule is the right first move. Automatic Robots.txt adds and maintains that rule for you, and Agent Analytics confirms FastDAST actually honors it.
Does FastDAST Access Private Content?
It probes for private content deliberately. Login pages, admin panels, and API endpoints are exactly what FastDAST tests, because exposed ones are what it exists to find. Probing is not the same as getting in, but expect requests to sensitive paths in your logs.
Why Is FastDAST Visiting My Website?
FastDAST is scanning your site for vulnerabilities, either as part of a sweep across the whole internet or because someone requested an assessment of your domain. Recurring visits usually mean a monitoring service has you on its list.
How Can I Tell if FastDAST Is Visiting My Website?
Agent Analytics tracks FastDAST visits in real time alongside every other known AI agent, crawler, and scraper. You can also check your server logs for requests whose user agent string contains "FastDAST". Look for probes of login, admin, and API paths. Keep in mind that FastDAST doesn't publish a verification method, so any client can claim its user agent string and a log match is a hint rather than proof.