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csci100.org

.org crawl

First seen 2026-04-29 · Last seen 2026-04-29 · ok HTTP/1.1 200 729 ms crawled 2026-05-07

US · 185.199.109.153 · AS54113 Fastly, Inc.

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title
Home | CSCI 100
Description
Intro to Computer Science
Language
en-US
Generator
Jekyll v3.9.2
Canonical
https://csci100.org/

Open Graph

url
https://csci100.org/
title
Home
locale
en_US
site name
CSCI 100
description
Intro to Computer Science

Technology

CDN
Fastly
Server
GitHub.com
Analytics
  • Google Tag Manager

Third-party hosts loaded (1)

  • www.googletagmanager.com×1

Social

Registration

Registrar
Squarespace Domains II LLC
Created
2021-07-19
Expires
2026-07-19 61 days left
Updated
2025-07-17
Name servers
  • ns-cloud-c1.googledomains.com
  • ns-cloud-c2.googledomains.com
  • ns-cloud-c3.googledomains.com
  • ns-cloud-c4.googledomains.com

DNS records live

NS
  • ns-cloud-c1.googledomains.com
  • ns-cloud-c2.googledomains.com
  • ns-cloud-c3.googledomains.com
  • ns-cloud-c4.googledomains.com
MX
  • 10 mxa.mailgun.org
  • 10 mxb.mailgun.org

Email authentication weak

SPF
v=spf1 include:mailgun.org ~all
softfail (~all)
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

R13
from 2026-04-20 to 2026-07-19
Expires in 62 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://csci100.org/

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

Links to (7)

Linked from (1)