playground.ru

Readiness by lane

Green: playground.ru. Thin bar: Puzzles & Video Games peer median.

Priority fixes for playground.ru

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

1. Priority 1 · Harden

   TLS 1.3 negotiated

   Observed: The TLS connection negotiated TLSv1.2.

   Why it matters: TLS 1.3 removes legacy cipher suites and completes the handshake in fewer round trips, so it is both safer and faster for new connections.

   What to do: Enable TLS 1.3 on your CDN or server. Keep TLS 1.2 available for older clients unless you have checked your audience.

   90% of Puzzles & Video Games peers do this. Limit: Certificate and protocol were observed from one vantage point; CDNs can present different certificates by region.

   Guide: HTTPS and TLS Guide for Website Owners

2. Priority 2 · Accelerate

   Static files cached for 30 days or more

   Observed: A same-site stylesheet or script was cacheable for 7 days, short of the 30-day benchmark.

   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.

   Guide: Browser Caching Guide for Website Owners

3. Priority 3 · 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

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 playground.ru already does well

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

• CAA records limit who can issue certificatesCAA limits issuance to digicert.com, letsencrypt.org.5.6% of peers
• Nameservers spread across providersNameservers spread across more than one operator.7.1% of peers
• DMARC policy enforces quarantine or rejectDMARC policy p=reject.21% of peers

What we saw

Homepage checked

https://www.playground.ru/

Homepage response

HTTP 200

TLS

TLSv1.2, HTTP/2

Certificate

Let's Encrypt, 89-day validity, expiring 2026-12-06

DNS operators

2 self-run or other nameserver domains

HSTS

max-age 7 days

DMARC policy

p=reject

Homepage HTML

287 KB, gzip

Images on homepage

194 (webp 189, jpg 53, png 9, svg 1)

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

• 1geki.jp66
• geometrydash.com67
• rngdle.com68
• roguelegend.io68
• word.tips67

Puzzles & Video Games readiness benchmark