What technology does mathnet.ru use?

mathnet.ru is built with PHP, Google Analytics, Apache.

Is mathnet.ru secure (HTTPS)?

Yes. mathnet.ru uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Aug 4, 2026.

Who hosts mathnet.ru?

Hosting provider information for mathnet.ru is not available yet.

What is mathnet.ru's SEO score?

mathnet.ru scored 55/100 for SEO in the latest analysis (fair).

What is mathnet.ru's overall website score?

mathnet.ru has an overall SiteGraph score of 62/100, combining SEO, performance, security, and accessibility.

mathnet.ru

Math-Net.Ru

Last scanned Jul 26, 2026, 5:18 AM

Overall score

Fair

Summary

This website uses Apache. SEO is fair (55/100) and accessibility is poor (45/100). Security scores good (75/100) and performance fair (70/100). Top issue: Missing meta description.

Top issues to fix

14 issues found · 7 high priority

TLS certificate expires in 9 days
Security
Renew now (or enable auto-renewal) — an expired certificate blocks visitors with a full-page browser warning.
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.
Over half of images are missing alt text
Accessibility
Add alt attributes to images — screen readers depend on them, and they help image SEO.
Missing viewport meta tag
Accessibility
Add <meta name="viewport" content="width=device-width, initial-scale=1"> — without it the site is broken on mobile.

+8 more issues — details in the sections below.

SEO

6 issue(s) found

Performance

10.36 s

Security

HTTPS & header checks

Accessibility

4 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.

Organization

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

YouTube YouTube

Technologies

Detected frameworks, languages, and tools.

PHP Google Analytics Apache

Hosting & CDN

Hosting provider: —
CDN provider: —
IP address: —
ASN: —

DNS records

Type	Value
A	—
AAAA	—
MX	—
TXT	—
NS	—
CAA	—
CNAME	—
IPv6 support	No

TLS / SSL certificate

Version: TLS 1.3
Issuer: Let's Encrypt
Subject: www.mathnet.ru
Valid from: May 6, 2026
Valid to: Aug 4, 2026
Days until expiry: 9
SAN domains: math-net.ru, mathnet.ru, www.math-net.ru, www.mathnet.ru

Security headers

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

Compression: gzip · 1 cookie(s) observed

Content & assets

Headings

H1 0 · H2 1 · H3 0

Links

185 internal · 7 external · 20 broken

Images

302 total · 188 missing alt

Scripts / Styles

14 scripts · 3 stylesheets

JS / CSS size

2.9 KB · 0 B

Page size

128 KB

Robots.txt & Sitemap

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

SEO issues

Missing meta description
No H1 heading found
No structured data (JSON-LD) found
Missing OpenGraph tags
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://mathnet.ru
Final URL: https://www.mathnet.ru/
HTTP status: 200
HTTP version: HTTP/2
Response time: 10.36 s
HTML size: 128 KB
Redirect chain: https://mathnet.ru → https://www.mathnet.ru/

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does mathnet.ru use?: mathnet.ru is built with PHP, Google Analytics, Apache.
Is mathnet.ru secure (HTTPS)?: Yes. mathnet.ru uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Aug 4, 2026.
Who hosts mathnet.ru?: Hosting provider information for mathnet.ru is not available yet.
What is mathnet.ru's SEO score?: mathnet.ru scored 55/100 for SEO in the latest analysis (fair).
What is mathnet.ru's overall website score?: mathnet.ru has an overall SiteGraph score of 62/100, combining SEO, performance, security, and accessibility.