Technical Information
| HTTP Status Code | 200 |
| HTTP Version | HTTP/1.1 |
| HTTPS | ✔ Available |
| IP Address | 92.53.96.209 |
| Server Software | nginx/1.30.3 |
| Compression | gzip |
|
🔒 🟡 Mixed Content (1 HTTP resources) | The page is served over HTTPS but loads 1 resource(s) over HTTP. This may be blocked in modern browsers. |
|
🕐 🟡 Slow Response (1196 ms) | Response time exceeds 1 second. Consider optimizing the server or using caching. |
|
ℹ 🔵 Missing HSTS | HTTP Strict Transport Security is not configured. Recommended for HTTPS sites. |
|
ℹ 🔵 Missing Content Security Policy | CSP is not configured. It helps prevent XSS attacks and content injection. |
|
ℹ 🔵 Missing X-Frame-Options | The site can be embedded in iframes by third parties (clickjacking risk). |
HTTP Status Code 200
HTTP Version HTTP/1.1
HTTPS ✔ Available
IP Address 92.53.96.209
Server Software nginx/1.30.3
Compression gzip
🔒 🟡 Mixed Content (1 HTTP resources) The page is served over HTTPS but loads 1 resource(s) over HTTP. This may be blocked in modern browsers.
🕐 🟡 Slow Response (1196 ms) Response time exceeds 1 second. Consider optimizing the server or using caching.
ℹ 🔵 Missing HSTS HTTP Strict Transport Security is not configured. Recommended for HTTPS sites.
ℹ 🔵 Missing Content Security Policy CSP is not configured. It helps prevent XSS attacks and content injection.
ℹ 🔵 Missing X-Frame-Options The site can be embedded in iframes by third parties (clickjacking risk).
Redirect Chain
| # | URL | HTTP Status Code | Status |
| 1 | https://www.sch2000.ru:443 | 301 | HTTP/2 301 |
| 2 | https://peterson.institute/?&utm_source=site&utm_medium=old&utm_campaign=sch2000_ | 200 | HTTP/2 200 |
#1 URL https://www.sch2000.ru:443
HTTP Status Code 301
Status HTTP/2 301
#2 URL https://peterson.institute/?&utm_source=site&utm_medium=old&utm_campaign=sch2000_
HTTP Status Code 200
Status HTTP/2 200
Performance
| DNS Lookup | 101.3 ms |
| TCP Connect | 143.1 ms |
| TLS Handshake | 56.4 ms |
| Time To First Byte (TTFB) | 1069.2 ms |
| Content Download | 127 ms |
| Total Response Time | 1196.2 ms |
DNS Lookup 101.3 ms
TCP Connect 143.1 ms
TLS Handshake 56.4 ms
Time To First Byte (TTFB) 1069.2 ms
Content Download 127 ms
Total Response Time 1196.2 ms
Security
| HTTPS | ✔ Enabled |
| HSTS | ✘ Not configured |
| CSP | ⚠ Not configured |
| X-Frame-Options | ⚠ Not configured |
| X-Content-Type-Options | ⚠ Not configured |
| HTTP/2 | ⚠ HTTP/1.1 |
HTTPS ✔ Enabled
HSTS ✘ Not configured
CSP ⚠ Not configured
X-Frame-Options ⚠ Not configured
X-Content-Type-Options ⚠ Not configured
HTTP/2 ⚠ HTTP/1.1
SEO Quick Check
| Title | Главная — Петерсон |
| Meta Description | Образовательная система Л. Г. Петерсон — математика для тех, кто учится учиться |
| Robots Meta | index, follow |
Title Главная — Петерсон
Meta Description Образовательная система Л. Г. Петерсон — математика для тех, кто учится учиться
Robots Meta index, follow
Detected Technologies
| Technology | WordPress jQuery Google Analytics Google Tag Manager Cloudflare Nginx PHP |
Technology WordPress jQuery Google Analytics Google Tag Manager Cloudflare Nginx PHP
HTTP Headers
| Server
| nginx/1.30.3 |
| Date
| Tue, 21 Jul 2026 01:37:13 GMT |
| Content-type
| text/html; charset=UTF-8 |
| Vary
| Accept-Encoding |
| X-powered-cms
| Bitrix Site Manager (ccf0042d5698664e44bad0c90bcd6f6e) |
| Set-cookie
| BITRIX_SM_LAST_VISIT=21.07.2026%2004%3A37%3A12; expires=Fri, 16 Jul 2027 01:37:12 GMT; Max-Age=31103999; path=/; domain=peterson.institute |
| Expires
| Thu, 19 Nov 1981 08:52:00 GMT |
| Cache-control
| no-store, no-cache, must-revalidate |
| Pragma
| no-cache |
| Last-modified
| Tue, 30 Jun 2026 14:53:19 GMT |
| Content-encoding
| gzip |
Meta Tags
| Viewport | width=device-width, initial-scale=1.0, maximum-scale=1.0,user-scalable=0 |
| X-UA-Compatible | ie=edge |
| Description | Образовательная система Л. Г. Петерсон — математика для тех, кто учится учиться |
| Content-Type | text/html; charset=UTF-8 |
| Robots | index, follow |
Server nginx/1.30.3
Date Tue, 21 Jul 2026 01:37:13 GMT
Content-type text/html; charset=UTF-8
Vary Accept-Encoding
X-powered-cms Bitrix Site Manager (ccf0042d5698664e44bad0c90bcd6f6e)
Set-cookie BITRIX_SM_LAST_VISIT=21.07.2026%2004%3A37%3A12; expires=Fri, 16 Jul 2027 01:37:12 GMT; Max-Age=31103999; path=/; domain=peterson.institute
Expires Thu, 19 Nov 1981 08:52:00 GMT
Cache-control no-store, no-cache, must-revalidate
Pragma no-cache
Last-modified Tue, 30 Jun 2026 14:53:19 GMT
Content-encoding gzip
