indexo.dev

railsspeed.com

.com crawl

First seen 2026-04-13 · Last seen 2026-05-02 · ok HTTP/1.1 200 586 ms crawled 2026-05-07

US · 172.67.155.160 · AS13335 Cloudflare, Inc.

Reputation 92/100 no dmarc policy

Classifying

HTML metadata

Title
The Complete Guide to Rails Performance
Description
The Complete Guide to Rails Performance course teaches you how to diagnose and optimize production Ruby on Rails performance problems.
Canonical
https://www.railsspeed.com/

Technology

CDN
Cloudflare
Fonts
  • Google Fonts

Third-party hosts loaded (2)

  • fonts.googleapis.com×1
  • fonts.gstatic.com×1

Social

Registration

Registrar
Squarespace Domains II LLC
Created
2016-01-07
Expires
2027-01-07 233 days left
Updated
2025-12-23
Name servers
  • ernest.ns.cloudflare.com
  • venus.ns.cloudflare.com

DNS records live

NS
  • ernest.ns.cloudflare.com
  • venus.ns.cloudflare.com
MX
  • 1 aspmx.l.google.com
  • 10 alt3.aspmx.l.google.com
  • 10 alt4.aspmx.l.google.com
  • 5 alt1.aspmx.l.google.com
  • 5 alt2.aspmx.l.google.com
TXT
  • google-site-verification=bgpy0frFbg5b4_T3TkVCfCXS8BAqVTkxaXetezWi5uk
  • google-site-verification=Eip_wkEojJgOc2ytyQS8JoSprYXSRXcYTInUA3kYMZw

Email authentication partial

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 55/100 Checked live page: https://www.railsspeed.com/

present
  • strict-transport-security
  • x-content-type-options
findings
  • short HSTS max-age
  • missing Content Security Policy
  • missing frame protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
x-content-type-options
nosniff
strict-transport-security
max-age=0; preload

Links to (2)

Linked from (1)