dian.gov.co

Readiness by lane

Green: dian.gov.co. Thin bar: Government Services peer median.

Priority fixes for dian.gov.co

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

1. Priority 1 · Accelerate

   HTTP/2 negotiated

   Observed: The TLS handshake selected HTTP/1.1 instead of HTTP/2.

   Why it matters: HTTP/2 sends many files over one connection, which speeds up pages with lots of images, styles and scripts.

   What to do: Enable HTTP/2 on your CDN or server. Most CDNs do this by default.

   55% of Government Services peers do this. Limit: Certificate and protocol were observed from one vantage point; CDNs can present different certificates by region.

   Guide: CDN Guide for Website Owners

2. Priority 2 · Enable

   robots.txt published

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

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

   61% of Government Services peers do this.

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

3. Priority 3 · Accelerate

   Static files cached for 30 days or more

   Observed: A same-site stylesheet or script was cacheable for no max-age, 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.

   30% of Government Services peers do this.

   Guide: Browser Caching Guide for Website Owners

4. Priority 4 · 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.

   68% of Government Services peers do this.

   Guide: A Practical Website Health Check for Owners

What dian.gov.co already does well

Practices fewer than half of Government Services peers use.

• Reachable over IPv6IPv6 address published.27% of peers

What we saw

Homepage checked

https://www.dian.gov.co/

Homepage response

HTTP 200

TLS

TLSv1.3

Certificate

DigiCert, 198-day validity, expiring 2027-01-02

DNS operators

1 self-run or other nameserver domain

HSTS

max-age 365 days, includeSubDomains

DMARC policy

p=reject

Homepage HTML

44 KB, gzip

Images on homepage

34 (png 33, jpg 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 Government Services sites

• browardclerk.org42
• bseh.org.in42
• dges.gov.pt42
• etrade.gov.et42
• euskadi.eus42

Government Services readiness benchmark