indexo.dev

internetgoschool.com

.com crawl

First seen 2026-05-31 · Last seen 2026-05-31 · ok HTTP/1.1 200 456 ms crawled 2026-06-01

US · 3.164.68.43 · AS16509 Amazon.com, Inc.

Reputation 89/100 weak security headers dmarc monitor-only

Classifying

HTML metadata

Title
Guo Juan's Internet Go School
Description
Go Lessons with practice problems for every player level. Spaced Repetition System so you will REMEMBER.
Language
en

Technology

CDN
Amazon CloudFront
Server
AmazonS3

Registration

Registrar
Amazon Registrar, Inc.
Created
2008-11-04
Expires
2026-11-04 155 days left
Updated
2026-05-14
Name servers
  • ns-1053.awsdns-03.org
  • ns-1874.awsdns-42.co.uk
  • ns-439.awsdns-54.com
  • ns-935.awsdns-52.net

DNS records live

NS
  • ns-1053.awsdns-03.org
  • ns-1874.awsdns-42.co.uk
  • ns-439.awsdns-54.com
  • ns-935.awsdns-52.net
MX
  • 10 mx.zoho.eu
  • 20 mx2.zoho.eu
  • 50 mx3.zoho.eu
Verified for
  • Google
  • Zoho

Email authentication partial

SPF
v=spf1 include:zoho.eu ~all
softfail (~all)
DMARC
v=DMARC1; p=none;
policy: none (monitoring only)
DKIM
  • mail: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCd+UC9XN3IwQaTOqCbey33OfS0vKiopioy0wRjm/9ixsDIubVDGQ6GJjUGyGFK6U+JCveQ/Zr/u6TVLMy39M…
  • s1: k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAy2vUhYsbg0MR0QoB0KQKp3gSFm+zH8ypa6/aibcTWr98+HCBpioDlaC2+TKEr3Rf3VSY6qTwdOE+nehd1i…
  • s2: k=rsa; t=s; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDm3ZCqnD/wj/DYlXFy0jO/yWqMz8ll0Fgm2JCeG4K6UZMPmtYTPLPnyV+HuUjQkteN35Jnk0lZx8Z1Bxzt+iT8NI…
selectors probed

Certificate (current)

Amazon RSA 2048 M01
from 2025-09-28 to 2026-10-27
Expires in 147 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://internetgoschool.com/

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

Linked from (2)