adda247.com

Readiness by lane

Green: adda247.com. Thin bar: Education & Online Learning peer median.

Priority fixes for adda247.com

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

1. Priority 1 · Harden

   HSTS kept for at least a year

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

   Why it matters: HSTS tells browsers to use HTTPS for your host on every later visit, which removes the window where a first HTTP request can be intercepted.

   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.

   On Amazon CloudFront: Attach a response headers policy with Strict-Transport-Security to each distribution.

   34% of Education & Online Learning peers do this. Limit: Read from the homepage response only; other pages or regions may send different headers.

   Guide: HTTPS and TLS Guide for Website Owners

2. Priority 2 · Harden

   Framing restricted

   Observed: The homepage did not send frame-ancestors or X-Frame-Options, so other sites may frame it.

   What to do: Send Content-Security-Policy: frame-ancestors 'self' (or a list of trusted origins). X-Frame-Options: SAMEORIGIN covers older browsers.

   On Amazon CloudFront: Set frame options in a response headers policy.

   49% of Education & Online Learning peers do this.

   Guide: A Practical Website Health Check for Owners

3. Priority 3 · Harden

   Certificate lifetime of 100 days or less

   Observed: The certificate from Amazon had a 197-day validity period, longer than the 100-day maximum that applies from March 2027.

   What to do: Move to automated issuance and renewal now, while you still have time to test it.

   60% of Education & Online Learning peers do this.

   Guide: HTTPS and TLS Guide for Website Owners

4. Priority 4 · Harden

   Content Security Policy present

   Observed: The homepage response did not include a Content-Security-Policy header.

   What to do: Start with Content-Security-Policy-Report-Only to see what would break, tighten the policy over a few weeks, then enforce it.

   25% of Education & Online Learning peers do this.

   Guide: Payment Security and PCI DSS: What Website Owners Need to Know

What adda247.com already does well

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

• HTTP/3 advertisedHTTP/3 advertised.25% of peers
• Modern image formats in useWebP or AVIF images detected.32% of peers
• DMARC policy enforces quarantine or rejectDMARC policy p=quarantine.36% of peers

What we saw

Homepage checked

https://www.adda247.com/

Homepage response

HTTP 200

TLS

TLSv1.3, HTTP/2

Certificate

Amazon, 197-day validity, expiring 2027-04-24

CDN or edge

Amazon CloudFront

DNS operators

Amazon Route 53

DMARC policy

p=quarantine

Homepage HTML

512 KB, gzip

Images on homepage

98 (png 49, webp 37, svg 11)

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

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Education & Online Learning readiness benchmark