What technology does ioffe.ru use?

ioffe.ru is built with jQuery, Nginx.

Is ioffe.ru secure (HTTPS)?

Yes. ioffe.ru uses TLS 1.2 with a certificate issued by Let's Encrypt, valid until Sep 14, 2026.

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

What is ioffe.ru's SEO score?

ioffe.ru scored 50/100 for SEO in the latest analysis (fair).

What is ioffe.ru's overall website score?

ioffe.ru has an overall SiteGraph score of 69/100, combining SEO, performance, security, and accessibility.

ioffe.ru

home | Ioffe Institute

Last scanned Aug 24, 2026, 1:22 PM · 2 views

Overall score

Fair

Summary

This website uses Nginx. SEO is fair (50/100) and accessibility is fair (65/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Missing meta description.

Top issues to fix

16 issues found · 4 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.
TLS certificate expires in 20 days
Security
Renew soon or enable auto-renewal to avoid a browser-warning outage.
Missing X-Content-Type-Options header
Security
Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.

+10 more issues — details in the sections below.

SEO

7 issue(s) found

100

Performance

511 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: web@ioffe.ru

Meta tags

Title: home | Ioffe Institute
Description
Canonical
Language
Charset: utf-8
Viewport: width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no
Robots meta
Manifest

Technologies

Detected frameworks, languages, and tools.

jQuery Nginx

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 1.2
Issuer: Let's Encrypt
Subject: *.ioffe.ru
Valid from: Jun 16, 2026
Valid to: Sep 14, 2026
Days until expiry: 20
SAN domains: *.ioffe.ru, ioffe.ru

Security headers

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

Compression: none · 1 cookie(s) observed

Content & assets

Headings

H1 0 · H2 0 · H3 0

Links

29 internal · 15 external · 10 broken

Images

13 total · 4 missing alt

Scripts / Styles

14 scripts · 6 stylesheets

JS / CSS size

903 B · 0 B

Page size

20.2 KB

Robots.txt & Sitemap

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

SEO issues

Missing meta description
Missing canonical link
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://ioffe.ru
Final URL: https://www.ioffe.ru/en/
HTTP status: 200
HTTP version: HTTP/1.1
Response time: 511 ms
HTML size: 20.2 KB
Redirect chain: https://ioffe.ru → https://www.ioffe.ru/ → https://www.ioffe.ru/en/

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does ioffe.ru use?: ioffe.ru is built with jQuery, Nginx.
Is ioffe.ru secure (HTTPS)?: Yes. ioffe.ru uses TLS 1.2 with a certificate issued by Let's Encrypt, valid until Sep 14, 2026.
Who hosts ioffe.ru?: Hosting provider information for ioffe.ru is not available yet.
What is ioffe.ru's SEO score?: ioffe.ru scored 50/100 for SEO in the latest analysis (fair).
What is ioffe.ru's overall website score?: ioffe.ru has an overall SiteGraph score of 69/100, combining SEO, performance, security, and accessibility.