indexo.dev

rlhfbook.com

.com crawl

First seen 2026-05-04 · Last seen 2026-05-04 · ok HTTP/1.1 200 490 ms crawled 2026-05-11

US · 172.67.209.53 · AS13335 Cloudflare, Inc.

Reputation 95/100 weak security headers

Classifying

HTML metadata

Title
RLHF Book by Nathan Lambert
Language
en-US
Generator
pandoc

Open Graph

url
https://rlhfbook.com
title
RLHF Book by Nathan Lambert
description
The Reinforcement Learning from Human Feedback Book

Technology

CDN
Cloudflare
Analytics
  • Plausible

Third-party hosts loaded (3)

  • cdn.jsdelivr.net×1
  • github.githubassets.com×1
  • plausible.io×1

Social

Registration

Registrar
Porkbun LLC
Created
2024-05-20
Expires
2027-05-20 366 days left
Updated
2026-03-30
Name servers
  • marjory.ns.cloudflare.com
  • viddy.ns.cloudflare.com

DNS records live

NS
  • marjory.ns.cloudflare.com
  • viddy.ns.cloudflare.com

Email authentication no MX

SPF
not published
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

WE1
from 2026-03-30 to 2026-06-28
Expires in 40 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 45/100 Checked live page: https://rlhfbook.com/

present
  • x-content-type-options
  • referrer-policy
findings
  • missing HSTS
  • missing Content Security Policy
  • missing frame protection
  • missing Permissions Policy
Header values
referrer-policy
strict-origin-when-cross-origin
x-content-type-options
nosniff

Links to (4)

Linked from (1)