Scan report for duallab.com
5 pages crawled — 7217 words, 120 images and 550 links read straight off the pages and checked for accessibility, performance, SEO, security, forms, links and infrastructure. 51 distinct problems found, counted 146 times across the pages.
Report updated 2026-10-28
Category scores
- Overall
- 83/100
- SEO
- 48/100 · Issues: 22
- Accessibility
- 66/100 · Issues: 30
- Performance
- 75/100 · Issues: 23
- Security
- 36/100 · Issues: 36
- Privacy
- 94/100 · Issues: 10
- HTML validity
- 98/100 · Issues: 2
- Forms
- 97/100 · Issues: 3
- Links
- 93/100 · Issues: 7
- Console
- 86/100 · Issues: 8
- Infrastructure
- 100/100 · No issues found
- Mobile
- 99/100 · Issues: 1
- Images
- 98/100 · Issues: 4
Quick Wins
High-impact, low-effort fixes, ranked by what this scan actually found.
- Let the viewport be zoomed — Anyone who needs larger text can zoom the page.
- Stop robots.txt from disallowing the whole site — Search engines are allowed to read the site at all.
- Send a Strict-Transport-Security header — Browsers refuse to fall back to plain HTTP for this domain.
- Write meta descriptions for the pages without one — Google stops inventing snippets and shows the copy you wrote.
- Set font-display: swap on the web fonts — Text is readable in a fallback face from the first paint instead of being hidden.
- Send X-Content-Type-Options: nosniff — Browsers stop guessing content types and executing files as scripts.
What the site checks found
- Critical — SEO — robots.txt disallows crawling of the home page — search engines are shut out of the site.
- Low — SEO — robots.txt has no Sitemap: line — crawlers have to guess where the sitemap is.
- Low — Security — No /.well-known/security.txt — anyone who finds a vulnerability has to guess where to report it.
- Low — Security — Response headers publish exact software versions: server: Apache/2.4.66 (Ubuntu).
- High — Security — The site is listed on Spamhaus ZEN (dynamic address range) — mail and traffic from it get filtered.
- Low — Security — No CAA record — any certificate authority may issue a certificate for this domain.
- Low — Security — The zone is not signed with DNSSEC, so a forged DNS answer cannot be detected.
- Medium — Performance — 18 of 18 static files checked are cached for less than a week, or not at all — returning visitors download them again.
- Low — Performance — The HTML is compressed with gzip but not with Brotli, which every current browser accepts and which is typically 15–20% smaller.
- Low — Links — Internal links that reach their page through a redirect: 1 of 2 checked.
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