Is sdf.org secure (HTTPS)?

Yes. sdf.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 7, 2026.

What is sdf.org's SEO score?

sdf.org scored 50/100 for SEO in the latest analysis (fair).

What is sdf.org's overall website score?

sdf.org has an overall SiteGraph score of 71/100, combining SEO, performance, security, and accessibility.

sdf.org

SDF Public Access UNIX System - Free Shell Account and Shell Access

Last scanned Jul 26, 2026, 5:17 AM · 2 views

Overall score

Fair

Summary

This website uses Apache hosted on HOPONE-GLOBAL - HopOne Internet Corporation, US. SEO is fair (50/100) and accessibility is good (75/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Title longer than 60 characters.

United States

Hosted on HOPONE-GLOBAL - HopOne Internet Corporation, US

Top issues to fix

13 issues found · 5 high priority

Missing Strict-Transport-Security header
Security
Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
Security
Add a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing meta description
SEO
Add a ~150-character meta description to control your search-result snippet and lift click-through rate.
No H1 heading found
SEO
Add exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.
Missing viewport meta tag
Accessibility
Add <meta name="viewport" content="width=device-width, initial-scale=1"> — without it the site is broken on mobile.
Missing X-Content-Type-Options header
Security
Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.

+7 more issues — details in the sections below.

SEO

7 issue(s) found

100

Performance

300 ms

Security

HTTPS & header checks

Accessibility

3 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Contact

Email, phone, and address published on this site's own pages.

Email: membership@sdf.org press@sdf.org

Meta tags

Title: SDF Public Access UNIX System - Free Shell Account and Shell Access
Description
Canonical
Language
Charset
Viewport
Robots meta
Manifest

Technologies

Detected frameworks, languages, and tools.

Apache

Hosting & CDN

Hosting provider: HOPONE-GLOBAL - HopOne Internet Corporation, US
CDN provider: —
IP address: 205.166.94.16
ASN: AS14361 (HOPONE-GLOBAL - HopOne Internet Corporation, US)

DNS records

Type	Value
A	205.166.94.16
AAAA	—
MX	mx.sdf.org
TXT	google-site-verification=f_IZGvm9STb9qD_OALNWOBBqguBJc0eJXWTvTkKjXSc v=spf1 ip4:205.166.94.0/24 -all
NS	ns-d.sdf.org ns-b.sdf.org ns-a.sdf.org ns-c.sdf.org
CAA	—
CNAME	—
IPv6 support	No

TLS / SSL certificate

Version: TLS 1.3
Issuer: Let's Encrypt
Subject: sdf.org
Valid from: Jul 9, 2026
Valid to: Oct 7, 2026
Days until expiry: 73
SAN domains: sdf.org

Security headers

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

Compression: none · 0 cookie(s) observed

Content & assets

Headings

H1 0 · H2 0 · H3 1

Links

24 internal · 1 external · 0 broken

Images

0 total · 0 missing alt

Scripts / Styles

0 scripts · 0 stylesheets

JS / CSS size

0 B · 1.0 KB

Page size

4.1 KB

Robots.txt & Sitemap

robots.txt: Found
Disallow rules: 1
sitemap.xml: Not found
URLs in sitemap: 0

SEO issues

Title longer than 60 characters
Missing meta description
Missing canonical link
No H1 heading found
No structured data (JSON-LD) found
Missing OpenGraph tags
sitemap.xml not found

Scan details

Requested URL: https://sdf.org
Final URL: https://sdf.org
HTTP status: 200
HTTP version: HTTP/1.1
Response time: 300 ms
HTML size: 4.1 KB
Redirect chain: https://sdf.org

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