krizovky-slovnik.cz

Readiness by lane

Green: krizovky-slovnik.cz. Thin bar: Puzzles & Video Games peer median.

Priority fixes for krizovky-slovnik.cz

Ordered by impact and by how common each practice is among peers.

1. Priority 1 · Accelerate

   Static files cached for 30 days or more

   Observed: A same-site stylesheet or script was cacheable for 1 days, short of the 30-day benchmark.

   Why it matters: Returning visitors and later page views reuse cached files instead of downloading them again.

   What to do: Give versioned (fingerprinted) CSS, JavaScript, fonts and images Cache-Control: public, max-age=31536000, immutable, and change the file name whenever the content changes.

   44% of Puzzles & Video Games peers do this. Limit: Read from the homepage response only; other pages or regions may send different headers.

   Guide: Browser Caching Guide for Website Owners

2. Priority 2 · Harden

   HSTS kept for at least a year

   Observed: Strict-Transport-Security was sent with a max-age of 7 days, below the one-year benchmark.

   What to do: Send Strict-Transport-Security on HTTPS responses. Start with a short max-age (for example 300 seconds), confirm every subdomain works over HTTPS, then raise it in steps to 31536000. Add includeSubDomains only when all subdomains are HTTPS. HSTS preload is optional and hard to undo; hstspreload.org itself does not recommend it by default.

   23% of Puzzles & Video Games peers do this.

   Guide: HTTPS and TLS Guide for Website Owners

3. Priority 3 · Harden

   DMARC policy enforces quarantine or reject

   Observed: No DMARC record was found at _dmarc.krizovky-slovnik.cz.

   What to do: Publish DMARC with p=none and a reporting address first, fix any legitimate senders that fail SPF or DKIM alignment, then move to quarantine and finally reject.

   21% of Puzzles & Video Games peers do this.

   Guide: A Practical Website Health Check for Owners

4. Priority 4 · Accelerate

   HTTP/3 advertised

   Observed: The homepage did not advertise HTTP/3 through an Alt-Svc header.

   What to do: Turn on HTTP/3 at your CDN. Browsers fall back to HTTP/2 automatically, so the risk is low.

   41% of Puzzles & Video Games peers do this.

   Guide: CDN Guide for Website Owners

What krizovky-slovnik.cz already does well

Practices fewer than half of Puzzles & Video Games peers use.

• Nameservers spread across providersNameservers spread across more than one operator.7.1% of peers
• DNSSEC signedDNSSEC delegation (DS record) present.8.2% of peers
• Framing restrictedFraming controls present.31% of peers

What we saw

Homepage checked

https://krizovky-slovnik.cz/

Homepage response

HTTP 200

TLS

TLSv1.3, HTTP/2

Certificate

Let's Encrypt, 89-day validity, expiring 2027-01-07

DNS operators

4 self-run or other nameserver domains

HSTS

max-age 7 days, includeSubDomains

Homepage HTML

12 KB, gzip

Images on homepage

0

Limits: homepage only, one location, one moment. Header checks reflect the homepage response; other pages may differ.

Stack and providers

Seen in the homepage response, certificate and DNS. Provider pages compare how their customers configure the same checks.

All 31 checks

Select a gap for the method and fix. How each check works

Compare with other Puzzles & Video Games sites

• contexto.me65
• fnfgo.com65
• jeusol.fr65
• ludoking.com65
• songspot.net65

Puzzles & Video Games readiness benchmark