What does StackOptic analyze?

StackOptic runs 18 analysis modules on any public website from a single URL. It detects 7,000+ technologies (CMS, frameworks, analytics, payments, CDN, hosting), evaluates SSL certificates and HTTP security headers with grades from A+ to F, measures Core Web Vitals (LCP, CLS, TBT, FCP), audits SEO meta tags and structured data, checks email security (SPF, DKIM, DMARC), analyzes AI & LLM readiness including bot access and llms.txt validation, extracts color palettes and typography, estimates carbon footprint, and generates permanent shareable reports.

Does it work on sites behind Cloudflare or bot protection?

Yes. StackOptic uses a real browser engine that loads pages exactly like a human visitor — executing JavaScript, rendering CSS, and handling redirects. This allows it to bypass Cloudflare, LiteSpeed, Sucuri, and other bot protection systems where traditional crawlers and HTTP-only tools fail.

What do I get on the free plan?

The free plan includes 5 analyses per day with access to all 18 modules, full scores, technology detection, and security grades. Every report is permanently accessible via a unique shareable URL — no login required to view. No credit card needed. AI-powered insights, re-analysis, PDF/JSON export, and comparison features are available on Pro ($24/mo) and Agency ($99/mo) plans.

What is AI & LLM readiness analysis?

This module evaluates how visible and citable your website is to AI search engines like ChatGPT, Perplexity, Google AI Overviews, and Claude. It audits access permissions for 8 major AI bots, validates llms.txt and llms-full.txt files, scores citation-ready content structure, and analyzes structured data (JSON-LD) for GEO readiness — helping you rank in the next generation of search.

How long does an analysis take?

Most analyses complete in under 10 seconds. StackOptic runs all 18 modules in parallel using a real browser session, so you get technology detection, security audit, performance metrics, SEO analysis, and AI readiness scoring simultaneously.

How accurate are the results?

Detection is based on real browser execution — DOM inspection, JavaScript runtime analysis, HTTP headers, and DNS records. With 7,000+ technology signatures and Lighthouse-calibrated performance scoring, StackOptic achieves high accuracy for mainstream technologies.

What security checks are performed?

The security module evaluates SSL/TLS certificates, 12+ HTTP security headers (HSTS, CSP, X-Frame-Options, Permissions-Policy, Referrer-Policy), HTTPS enforcement, and email authentication (SPF, DKIM, DMARC). Each site receives a letter grade from A+ to F with specific remediation steps.

Do you store the websites I analyze?

StackOptic only stores publicly available information that any visitor to a website would see — HTML content, HTTP headers, DNS records, and screenshots. We do not access private data, log in to websites, or perform any intrusive testing.

Back to Search

linuxserver.io

https://linuxserver.io· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

linuxserver.io

Sponsored

Hosting Provider

DigitalOcean

digitalocean.com

IP Address

178.62.84.203

Server Location

🇬🇧 Slough, United Kingdom

ASN

AS14061

Organization

Digital Ocean

Server

Nginx

CDN

Cloudflare

WAF

Cloudflare

Nameservers

lola.ns.cloudflare.com.sid.ns.cloudflare.com.

Performance

Page Speed

875 KB

9 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

Alpine.js

Styling

Tailwind CSS

CMS

Grav

Infrastructure

Hosting

DigitalOcean

CDN

Cloudflare

Technology Stack

5 Technologies Detected

Frameworks

CSS Frameworks

Icon Libraries

Web Servers

Languages

SEO Analysis

D47/100

linuxserver.iolinuxserver.io

Home | LinuxServer.io

No description available for this page.

Title Length21 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

• Missing meta description - important for click-through rates

6 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

21 rules

Sponsored

Security Score

21%Critical

Interactive

HTTPS

No WAF

79d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

07.02.2026

Valid Until

08.05.2026

Subject Alternative Names (2)

*.linuxserver.iolinuxserver.io

SHA-256 Fingerprint

68:40:37:2B:92:BD:76:59:AF:FF:AF:3B:3F:CF:1A:FF:1B:9E:18:33...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🔵 1 Week(max-age=604800)

connection

keep-alive

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=utf-8

date

Tue, 17 Feb 2026 09:04:50 GMT

etag

W/"16fcb5a6ddf953cd76f57aabdb18e203"

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (2)

one.mxroute.com

one-relay.mxroute.com

Domain Information

linuxserver.io

Domain Age

11y 4m

Created

14.10.2014

Expires

14.10.2029

Last Updated

25.05.2024

Registrar

Porkbun LLC

DNSSEC

Not Enabled

Typography & Readability

Inter var

83/100

Readability

/30

40/40

20px · LH 1.40

Hierarchy

/20

25/25

2.4x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Inter var

Sans48px

Body Font

Inter var

Sans20px

Contrast Ratio

Reading Comfort

Single Font Family

left aligned

48px

20px

✅ Excellent readability: 20px body text is ideal for all devices.

✅ Optimal line spacing: 1.40 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.4x larger than body text.

✅ Good performance: Using 1 font families keeps load times fast.

✅ Consistent design: Single font family with weight variations is a modern best practice.

✅ Smart font loading: Using font-display: swap prevents invisible text during load.

Buy on MyFonts

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

4 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(2)

Website Identity

GitHub Discord Bluesky

Sponsored

Last analyzed: 17 Feb 2026 at 09:04

Historical Analysis & Change Tracking