What powers 
testssl.sh?
Last seen Mar 2026 · 4 technologies across 3 categories
AI Crawlers
Blocks 13 of 33 AI crawlers we track by name in its robots.txt. Checked Sep 2026.
Training crawlers
- Applebot-Extended Blocked
- Bytespider Blocked
- CCBot Blocked
- ClaudeBot Blocked
- Diffbot Blocked
- FacebookBot Blocked
- Google-Extended Blocked
- GPTBot Blocked
- meta-externalagent Blocked
Search and AI assistants
- Claude-SearchBot Blocked
- PerplexityBot Blocked
User-request fetchers
- Claude-User Blocked
- meta-externalfetcher Blocked
The other 20 AI crawlers we track are not mentioned and stay allowed by default.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
13 of 33 AI crawlers blocked
Audience
- 100% desktop
India
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
6.37 / 10 · ranked #83,830 of all domains
196 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2 s |
| CLS | 0.05 |
| TTFB | 1300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Infrastructure
- Hosted on STRATO (81.169.235.32, IPv6)
- DNS: dirkw.org
- Email: testssl.sh
- Email security: no SPF record, no DMARC record, CAA
- SSL: Let's Encrypt, RSA 2048, expires Nov 2026
- Common Crawl link graph: rank 1,881,922
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted