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firehol.org

https://firehol.org· First analyzed 21 May 2026· Updated 21 May 2026
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firehol.org
Desktop screenshot of firehol.org
Mobile screenshot of firehol.org
Mobile

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Hosting Provider

Sunfox s.r.o.

IP Address

176.98.244.68

Site Location

🇨🇿 Czech Republicvia ip

Server Location

🇨🇿 Přezletice, Czechia

ASN

AS205300

Organization

Sunfox s.r.o.

Server

Nginx

CDN

Cloudflare

WAF

Cloudflare

Nameservers

rafe.ns.cloudflare.com.noah.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
443 ms10%
Speed Index
576 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.6 MB
7 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Bootstrap
Infrastructure
Hosting
Sunfox s.r.o.
CDN
Cloudflare

Technology Stack

3 Technologies Detected

Libraries

1
jQueryv1.11.2

CSS Frameworks

1
Bootstrapv3.3.2

Web Servers

1
Nginxv1.14.0

SEO Analysis

B72/100
20
6
0
Meta Tags15/15
Content12/12
Headings8/8
Technical13/25
E-E-A-T3/7
Images4/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
F
firehol.orgfirehol.org

FireHOL - Linux firewalling and traffic shaping for humans

FireHOL and FireQOS offer simple and powerful configuration for all Linux firewall and traffic shaping requirements

Title Length58 chars

Recommended: 50-60 chars (~350px / 580px)

Description Length122 chars

Recommended: 120-160 chars

Issues (0)

    6 issues found

    Upgrade to view details

    Crawlability

    Sitemap
    robots.txt

    10 rules

    Local SEO

    Local Search Readiness

    3/100
    Poor
    1 14 2

    This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

    Sponsored

    AI & LLM Readiness

    D41/100
    Bot Access
    20/25
    Machine Read.
    12/25
    Schema Data
    0/25
    Citation
    9/25

    AI Bot Access

    14/14 accessible
    AI Search
    OAI-SearchBot
    PerplexityBot
    Claude-SearchBot
    Gemini-Deep-Research
    DuckAssistBot
    Training
    GPTBot
    ClaudeBot
    Google-Extended
    Meta-ExternalAgent
    Bytespiderinfo
    Amazonbot
    Applebot-Extended
    CCBotinfo
    Fetch
    ChatGPT-User

    Machine Readability

    llms.txt
    llms-full.txt
    Semantic HTML
    Heading Hierarchy
    code blocksnav
    Text ratio:54%
    Words:1,779
    Token eff.:Optimal
    Sections/1K:4.5
    Depth:2/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary14w
    Descriptive Headingsavg 2.5w
    Canonical URL
    Open Graph0/3
    Twitter Card0/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (10)
    AI readiness recommendation preview...
    Upgrade to view recommendations

    Sponsored

    Accessibility

    WCAG 2.1 Compliance

    Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
    B
    73/100
    9
    Passed
    3
    Critical
    0
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    13/20
    Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
    Forms & Inputs
    15/15
    Verifies form fields have labels, error messages are clear, and inputs are properly associated.
    Color & Contrast
    15/15
    Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
    Keyboard & Focus
    9/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    1/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    1 recommendation
    • •Accessibility recommendation preview...
    Upgrade to view recommendations

    Carbon Footprint

    SWDM v4 · Eco-Score

    Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
    43/100
    C
    197 mg
    CO₂e / view
    1.6 MB
    Page Weight
    60%
    Cleaner Than
    New Visitor
    225 mg
    vs
    Returning (cached)
    112 mg
    Annual (10K/mo)
    23.6 kg
    Emission Segments
    Data Center
    44 mg
    Network
    47 mg
    Device
    106 mg
    Resource Breakdown
    JavaScript
    128.9 KB
    Images
    1.4 MB
    CSS
    25.5 KB
    HTML
    7.6 KB
    Green Hosting Not Verified
    Sunfox s.r.o.
    4 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    B

    Security Score

    76%Good
    Static / Informational

    HTTPS

    No WAF

    29d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Let's Encrypt

    Key Algorithm

    RSA (4096 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.2

    HTTP Protocol

    HTTP/1.1

    Valid From

    22.03.2026

    Valid Until

    20.06.2026

    Subject Alternative Names (5)

    firehol.orglists.firehol.orgmaster.firehol.orgtest.firehol.orgwww.firehol.org

    SHA-256 Fingerprint

    8A:7E:5E:53:02:09:96:24:1E:04:AB:3E:C9:3A:87:91:42:24:BB:7E...

    Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    cache-control
    🔴 No Cache(no-cache)
    connection
    keep-alive
    content-encoding
    📦 Gzip(gzip)
    content-type
    text/html
    date
    Thu, 21 May 2026 08:57:35 GMT
    etag
    W/"6805f2e9-505a"
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    50

    SPF
    DKIM
    DMARC

    MX Records (1)

    smtp.onlinehosting.cz

    Domain Information

    firehol.org

    Domain Age
    17y 5m

    Created

    27.11.2008

    Expires

    27.11.2026

    Last Updated

    02.11.2025

    Registrar

    Cloudflare, Inc.

    DNSSEC
    Not Enabled

    Mobile Compatibility

    Viewport & Responsive Test

    Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
    C
    67/100
    Mobile Friendly1 breakpoint
    Viewport Meta
    The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
    Responsive Design
    Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
    Touch Icons
    Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
    Readable Font Size
    Base font size should be at least 16px on mobile to ensure text is readable without zooming.
    Relative Units
    Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
    No H-Scroll Risk
    No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
    Tap Targets OK
    Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
    No Fixed Widths
    No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
    Viewport
    width=device-width, initial-scale=1
    2 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Helvetica Neue

    WCAG Partial
    80/100
    Readability
    /30
    26/30

    16px · LH 1.43

    Hierarchy
    /20
    17/20

    2.25x ratio · ✓ H1→H6

    WCAG
    /25
    17/25

    1.26:1 min contrast

    Performance
    /25
    20/25

    System fonts

    Heading Font

    Helvetica Neue

    Sans36px

    Body Font

    Helvetica Neue

    Sans16px

    Contrast Ratio

    1.26:1

    9 issues

    Reading Comfort

    ~39 CPL

    Narrow lines
    36px
    h1
    30px
    h2
    24px
    h3
    18px
    h4
    16px
    p

    ✅ Excellent readability: 16px body text is ideal for all devices.

    ✅ Optimal line spacing: 1.43 ratio (ideal range 1.4–1.6).

    ⚠️ Hard to read: Flesch score 48/100. Simplify sentences for wider reach.

    ⚠️ Partial contrast: 9 elements below WCAG AA threshold (min 1.3:1).

    ✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

    ✅ Strong hierarchy: Headlines are 2.2x larger than body text.

    Flesch 48

    Color Palette

    6 unique colors
    15.91:1 AAA Light
    #ffffff
    Background· 81.80000000000001%
    #222222
    Other· 6.199999999999999%

    Business & Marketing Stack

    1 Tools Detected

    Growing

    Behavior Analytics

    1
    Google AnalyticsFree

    User behavior and product analytics

    1

    Categories

    1

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Growing marketing technology adoption

    Sponsored

    Scripts & Styles

    4 Resources

    2
    Scripts
    2
    Styles
    0
    Async
    0
    Defer

    Top Script Sources

    local(2)

    Website Identity

    firehol.org

    17 years old
    Location detected: 🇨🇿 Czech Republicvia ip
    Cloudflare, Inc.en

    Sponsored

    Last analyzed: 21 May 2026 at 08:57

    Historical Analysis & Change Tracking