indexo.dev

computer-pdf.com

.com crawl

First seen 2026-04-14 · Last seen 2026-05-12 · ok HTTP/1.1 200 6911 ms crawled 2026-05-08

US · 172.67.193.118 · AS13335 Cloudflare, Inc.

Reputation 95/100 weak security headers

Classifying

HTML metadata

Title
Free Computer Science Courses: Learn Online
Description
Download 1000+ free computer PDFs - coding tutorials, cybersecurity guides, and IT certifications. Learn programming, networking, and tech skills instantly.
Language
en
Canonical
https://www.computer-pdf.com

Technology

CDN
Cloudflare
Analytics
  • Google Tag Manager
Ads
  • Google AdSense
Fonts
  • Google Fonts

Third-party hosts loaded (5)

  • pagead2.googlesyndication.com×2
  • cdn.jsdelivr.net×1
  • cdnjs.cloudflare.com×1
  • fonts.googleapis.com×1
  • www.googletagmanager.com×1

Contact

Address
st Online TutorialsCreate Immersive AR Training Apps with Unity 2026

Registration

Registrar
Cloudflare, Inc.
Created
2012-12-01
Expires
2027-01-01 226 days left
Updated
2025-12-02
Name servers
  • cody.ns.cloudflare.com
  • kim.ns.cloudflare.com

DNS records live

NS
  • cody.ns.cloudflare.com
  • kim.ns.cloudflare.com
MX
  • 10 mx.zoho.com
  • 20 mx2.zoho.com
  • 50 mx3.zoho.com
TXT
  • google-site-verification=Q5IjODpkYSBUIVz_-VC4t3r8nddpSGEle9EJtcTniK4
  • google-site-verification=UFRnDsWsf0rgVQMICxOzd4hf-giPLYzfkcd9adFwnpo
  • google-site-verification=Wiw5WPls9LI-wFBIw9VIaozyeH5JclK2bH2k-b1e0_g

Email authentication strong

SPF
v=spf1 include:zoho.com ip4:3.12.172.161 ~all
softfail (~all)
DMARC
v=DMARC1; p= quarantine
policy: quarantine
DKIM
  • mail: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA0aJqiqkGH9x6rTbx9aWc1yNpf3XkjpVRcIIrWff6Th0N2f8sqtOA0ijkz10cBxn0PzlED3VON5//pT…
selectors probed

Certificate (current)

WE1
from 2026-05-01 to 2026-07-30
Expires in 71 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://www.computer-pdf.com/

findings
  • missing HSTS
  • missing Content Security Policy
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy

Links to (4)

Linked from (2)