nll.red

Readiness by lane

Green: nll.red. Thin bar: Education & Online Learning peer median.

Priority fixes for nll.red

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

1. Priority 1 · Enable

   robots.txt published

   Observed: No robots.txt file was returned at the site root.

   Why it matters: robots.txt is where crawlers look first for crawl rules and sitemap locations. Without it, they assume everything is open.

   What to do: Publish /robots.txt with any crawl rules you need and a Sitemap: line pointing to your XML sitemap.

   82% of Education & Online Learning peers do this. Limit: Only the standard location was requested, once, at the time of the check.

   Guide: Robots.txt Guide: Control Crawling Without Hiding Mistakes

2. Priority 2 · Harden

   HSTS kept for at least a year

   Observed: The homepage response did not include a Strict-Transport-Security header.

   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.

   34% of Education & Online Learning peers do this.

   Guide: HTTPS and TLS Guide for Website Owners

3. Priority 3 · Harden

   DMARC policy enforces quarantine or reject

   Observed: The DMARC policy for nll.red was p=none, which asks receivers to take no action on failing mail.

   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.

   36% of Education & Online Learning peers do this.

   Guide: A Practical Website Health Check for Owners

4. Priority 4 · Accelerate

   Modern image formats in use

   Observed: The homepage had 20 images and none used WebP or AVIF.

   What to do: Serve WebP or AVIF with a JPEG or PNG fallback, either through an image CDN or by generating both formats at build time.

   32% of Education & Online Learning peers do this.

   Guide: AVIF, WebP, JPEG, and PNG: Choose the Right Image Format

What nll.red already does well

Practices fewer than half of Education & Online Learning peers use.

• No render-blocking scripts in <head>Head scripts load without blocking.42% of peers

What we saw

Homepage checked

https://nll.red/

Homepage response

HTTP 200

TLS

TLSv1.3, HTTP/2

Certificate

Let's Encrypt, 89-day validity, expiring 2026-11-17

DNS operators

1 self-run or other nameserver domain

DMARC policy

p=none

Homepage HTML

31 KB, gzip

Images on homepage

20 (gif 20)

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 Education & Online Learning sites

• alloschool.com50
• aparsclassroom.com50
• eiken.or.jp50
• padasalai.net50
• starfall.com50

Education & Online Learning readiness benchmark