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nmap.org

Nmap: the Network Mapper - Free Security Scanner

Last scanned Aug 1, 2026, 4:00 PM · 13 views

89

Overall score

Great

Summary

Nmap Free Security Scanner, Port Scanner, & Network Exploration Tool. This website uses Apache. SEO is good (85/100) and accessibility is excellent (100/100). Security scores good (75/100) and performance excellent (100/100). Top issue: Missing OpenGraph tags.

Nmap Free Security Scanner, Port Scanner, & Network Exploration Tool. Download open source software for Linux, Windows, UNIX, FreeBSD, etc.

Top issues to fix

7 issues found · 1 high priority

  • Missing Content-Security-Policy header

    Security

    Add a CSP to control which sources can run scripts — the strongest single defense against XSS.

  • Missing X-Content-Type-Options header

    Security

    Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.

  • Missing X-Frame-Options header

    Security

    Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.

  • Missing OpenGraph tags

    SEO

    Add og:title/og:description/og:image so shared links render a proper preview card.

  • robots.txt not found

    SEO

    Publish /robots.txt with a Sitemap: directive to guide crawlers.

  • sitemap.xml not found

    SEO

    Publish an XML sitemap and reference it from robots.txt to speed up page discovery.

+1 more issue — details in the sections below.

85

SEO

3 issue(s) found

100

Performance

248 ms

75

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Score history

-2 overall since Jul 25, 2026

Overall
89
SEO
85
Security
75
Performance
100
Accessibility
100

Organization

Company details published in this site's own structured data.

Nmap Free Security Scanner, Port Scanner, & Network Exploration Tool. Download open source software for Linux, Windows, UNIX, FreeBSD, etc.

X (Twitter)FacebookX (Twitter)GitHub

Meta tags

Title
Nmap: the Network Mapper - Free Security Scanner
Description
Nmap Free Security Scanner, Port Scanner, & Network Exploration Tool. Download open source software for Linux, Windows, UNIX, FreeBSD, etc.
Canonical
https://nmap.org/
Language
en
Charset
Viewport
width=device-width,initial-scale=1
Robots meta
NOARCHIVE
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
—
og:description
—
og:type
—
og:url
—

Twitter Card

twitter:card
—
twitter:title
—
twitter:description
—

Technologies

Detected frameworks, languages, and tools.

Google AnalyticsApache

Hosting & CDN

Hosting provider
—
CDN provider
—
IP address
—
ASN
—

DNS records

TypeValue
A—
AAAA—
MX—
TXT—
NS—
CAA—
CNAME—
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.2
Issuer
Let's Encrypt
Subject
insecure.com
Valid from
Jul 20, 2026
Valid to
Oct 18, 2026
Days until expiry
77
SAN domains
insecure.com, insecure.org, issues.nmap.com, issues.nmap.org, issues.npcap.com, issues.npcap.org, nmap.com, nmap.net, nmap.org, npcap.com, npcap.org, seclists.com, seclists.net, seclists.org, sectools.com, sectools.net, sectools.org, secwiki.com, secwiki.net, secwiki.org, svn.nmap.org, www.nmap.org

Security headers

  • Strict-Transport-SecurityEnabled
  • Content-Security-PolicyMissing
  • X-Frame-OptionsMissing
  • X-Content-Type-OptionsMissing
  • Referrer-PolicyMissing
  • Permissions-PolicyMissing

Compression: none · 0 cookie(s) observed

Content & assets

Headings

H1 1 · H2 7 · H3 0

Links

38 internal · 45 external · 20 broken

Images

9 total · 0 missing alt

Scripts / Styles

2 scripts · 3 stylesheets

JS / CSS size

377 B · 0 B

Page size

19.2 KB

Robots.txt & Sitemap

robots.txt
Not found
Disallow rules
0
sitemap.xml
Not found
URLs in sitemap
0

SEO issues

  • Missing OpenGraph tags
  • robots.txt not found
  • sitemap.xml not found

Accessibility issues

No accessibility issues detected.

Scan details

Requested URL
https://nmap.org
Final URL
https://nmap.org
HTTP status
200
HTTP version
HTTP/1.1
Response time
248 ms
HTML size
19.2 KB
Redirect chain
https://nmap.org

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does nmap.org use?
nmap.org is built with Google Analytics, Apache.
Is nmap.org secure (HTTPS)?
Yes. nmap.org uses TLS 1.2 with a certificate issued by Let's Encrypt, valid until Oct 18, 2026.
Who hosts nmap.org?
Hosting provider information for nmap.org is not available yet.
What is nmap.org's SEO score?
nmap.org scored 85/100 for SEO in the latest analysis (great).
What is nmap.org's overall website score?
nmap.org has an overall SiteGraph score of 89/100, combining SEO, performance, security, and accessibility.
Has nmap.org's score changed over time?
nmap.org's overall score has declined by 2 points (from 91 to 89) since Jul 25, 2026.