algochallenge.org

.org crawl

First seen 2026-05-09 · Last seen 2026-05-09 · ok HTTP/1.1 200 1285 ms crawled 2026-05-15

US · 125.253.90.20 · AS59210 PhoenixNAP

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title: Welcome to nginx!

Technology

Server: openresty

DNS records live

NS

ns15.domaincontrol.com
ns16.domaincontrol.com

MX

0 algochallenge-org.mail.protection.outlook.com

TXT

NETORGFT8640270.onmicrosoft.com

Email authentication weak

SPF: v=spf1 include:secureserver.net -all
strict (-all)
DMARC: not published
DKIM: no key found at common selectors

Certificate (current)

Go Daddy Secure Certificate Authority - G2

from 2026-04-19 to 2026-11-03

Expires in 168 days

Full certificate history on crt.sh ↗

HTTP security headers

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

findings

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

Linked from (1)

algogene.com×1