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tcpdump.org

https://tcpdump.org· First analyzed 25 Apr 2026· Updated 25 Apr 2026
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tcpdump.org
Desktop screenshot of tcpdump.org
Mobile screenshot of tcpdump.org
Mobile

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Hosting Provider

Freethought Internet Limited

IP Address

176.74.17.85

Site Location

🇬🇧 United Kingdomvia ip

Server Location

🇬🇧 Cricklewood, United Kingdom

ASN

AS41000

Organization

Freethought Internet Limited

Server

Apache

Nameservers

ns2.mythic-beasts.com.ns1.mythic-beasts.com.

Performance

93

Core Web Vitals

Weight

First Contentful Paint
1.3 s10%
Speed Index
1.7 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
27 KB
3 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Freethought Internet Limited

Technology Stack

1 Technologies Detected

Web Servers

1
Apache

SEO Analysis

D50/100
14
9
3
Meta Tags5/15
Content12/12
Headings3/8
Technical12/25
E-E-A-T0/7
Images1/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
T
tcpdump.orgtcpdump.org

Home | TCPDUMP & LIBPCAP

Web site of Tcpdump and Libpcap

Title Length24 chars

Recommended: 50-60 chars (~150px / 580px)

Description Length31 chars

Recommended: 120-160 chars

Issues (3)

  • • Missing H1 tag — every page should have exactly one H1
  • • Most images missing alt text (1/1) — critical for accessibility and SEO
  • • Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

12 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

26 URLs

robots.txt

55 rules

Sitemap reference found

Local SEO

Local Search Readiness

5/100
Poor
2 13 2

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

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AI & LLM Readiness

F25/100
Bot Access
7/25
Machine Read.
11/25
Schema Data
0/25
Citation
7/25

AI Bot Access

2/14 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 blocksdef. lists
Text ratio:35%
Words:896
Token eff.:Optimal
Sections/1K:14.5
Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary23w
Descriptive Headingsavg 1.8w
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (11)
AI readiness recommendation preview...
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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.
C
67/100
8
Passed
5
Critical
0
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
7/20
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.
2 recommendations
  • •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.
76/100
A+
3 mg
CO₂e / view
26.7 KB
Page Weight
95%
Cleaner Than
New Visitor
3 mg
vs
Returning (cached)
2 mg
Annual (10K/mo)
324 g
Emission Segments
Data Center
<0.001 g
Network
<0.001 g
Device
2 mg
Resource Breakdown
Images
18.9 KB
CSS
2.4 KB
HTML
5.3 KB
Green Hosting Verified
Freethought Internet
GWF Verified
2 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
A

Security Score

86%Very Good
Static / Informational

HTTPS

No WAF

190d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Sectigo Limited

Key Algorithm

ECDSA (secp384r1) (384 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

02.10.2025

Valid Until

01.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.tcpdump.orgtcpdump.org

SHA-256 Fingerprint

9A:41:C8:BC:43:B4:5D:18:8C:D8:90:25:64:EE:CE:C9:61:69:CC:5D...

Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges
bytes
cache-control
🔵 1 Days(max-age=86400)
connection
Keep-Alive
content-encoding
📦 Gzip(gzip)
content-length
5140
content-type
text/html; charset=UTF-8
Good Warning Issue

Email Infrastructure

Zoho Mail

Score

50

SPF
DKIM
DMARC

MX Records (3)

mx3.zoho.com
mx2.zoho.com
mx.zoho.com

Domain Information

tcpdump.org

Domain Age
26y 6m

Created

06.10.1999

Expires

06.10.2026

Last Updated

26.03.2026

Registrar

Tucows Domains 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.
F
32/100
Not Mobile Friendly
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.
4 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Arial

WCAG Partial
67/100
Readability
/30
23/30

16px · LH 1.40

Hierarchy
/20
8/20
WCAG
/25
16/25

1:1 min contrast

Performance
/25
20/25

System fonts

Heading Font

Arial

Sans

Body Font

Arial

Sans16px

Contrast Ratio

1:1

1 issue

Reading Comfort

~77 CPL

Wide lines
24px
h2
19px
h3
16px
p

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

✅ Optimal line spacing: 1.40 ratio (ideal range 1.4–1.6).

⚠️ Wide lines: ~77 chars/line. Use max-width: 65ch for comfortable reading.

⚠️ Hard to read: Flesch score 49/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 1 elements below WCAG AA threshold (min 1.0:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

Flesch 49

Color Palette

7 unique colors
2.78:1 Fail Light
#ffffff
Background· 77.09999999999998%
#9e9a9a
Other· 4.800000000000001%
#7e3d3d
Primary· 3%

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

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Scripts & Styles

1 Resources

0
Scripts
1
Styles
0
Async
0
Defer

Top Script Sources

Website Identity

tcpdump.org

tcpdump-workers-request@lists.tcpdump.org
26 years old
Location detected: 🇬🇧 United Kingdomvia ip
Tucows Domains Inc.📧 Zoho Mailen

Social Profiles

X (Twitter)GitHub

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Last analyzed: 25 Apr 2026 at 21:34

Historical Analysis & Change Tracking