简体中文
grc.com
Steve Gibson's and Gibson Research Corporation's Web homepage.
More topics (1)
At a glance
- Category
- Security & Privacy
- Language
- English
- Paid-content signal
- No paid content foundObserved
- Registered
- 1991
- Hosting
- Level 3 Parent, LLCInferred
- HTTPS certificate trusted
- PassedObserved
- Last updated
Related questions
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Website Overview
An established domain and managed infrastructure suggest continuity of operations and may support dependable delivery, although neither guarantees service quality. Several search or sharing settings need attention. Together they may make snippets, preview images or preferred URLs less consistent across platforms.
Domain and Registration
Registered in 1991, this domain has about 34 years of history. That suggests continuity, although ownership and purpose may have changed. Transfer-protection status is present, helping reduce the risk of unauthorized domain transfers. The registrar is Tucows Domains Inc., a widely used domain service provider. The domain uses the common .com extension, which is not an independent safety signal.
DNS and Email
Nameservers are provided by level3.net, indicating managed DNS hosting. MX records point to the grc.com email service. CAA records restrict which certificate authorities are authorized to issue certificates. No CNAME was found; the observed records resolve directly to addresses. SPF and DMARC are configured. DKIM status is unknown.
TLS and Certificates
The certificate includes the organization field Gibson Research Corporation. The certificate issuer is DigiCert Inc, a commercial certificate authority. The certificate uses an RSA 2048-bit public key, offering broad client compatibility. The server supplied a complete certificate chain. The certificate is valid for about 396 days in total, with 178 days remaining.
HTTP and Browser Security
The response lacks these common security headers: CSP, X-Content-Type-Options, Referrer-Policy, Permissions-Policy. CORS permits any origin to read this response. This is common for public resources; sensitive responses need narrower handling. No X-Powered-By header was found, reducing one common source of backend fingerprinting information. No obvious internal addresses or debug information were found in the headers. The Server header contains the custom value GRC/IIS Hybrid Application Webserver.
Technology Stack Analysis
The public page identifies Google Analytics without precise versions, leaving fewer clues for version-specific scanning.
Search and Social Sharing
No viewport meta tag was detected, which may affect mobile layout behavior. No homepage canonical URL was detected. If duplicate URLs exist, consolidation may be less explicit. No Open Graph metadata was detected, so social previews may depend on platform inference. The title has 35 characters, within a common display range. A meta description is present, with 62 characters.
Hosting and Email
Fontana, California, United States
Inferred
4.79.142.202
Registration details
| Registrar | Tucows Domains Inc. |
|---|---|
| Registered | 1991-12-17 |
| Expires | 2033-12-16 |
| Domain status | client transfer prohibited、client update prohibited |
| Nameservers | ns3.level3.net、ns4.level3.net |
| DNSSEC | unsigned |
DNS records
| Type | Name | Value | TTL | Priority |
|---|---|---|---|---|
| A | www.grc.com | 4.79.142.202 | 83749 | — |
| MX | grc.com | grc.com | 86400 | 10 |
| NS | grc.com | ns3.level3.net | 86400 | — |
| NS | grc.com | ns4.level3.net | 86400 | — |
| TXT | grc.com | 7pdq8vl28psslbzzx8g9s3pbwjvksk24 | 86400 | — |
| TXT | grc.com | _bpovimyxhv2xbvowiwnvlkhz27b4z4f | 86400 | — |
| TXT | grc.com | _e9izydias4fdktb7grdz8lx129rf0kz | 86400 | — |
| TXT | grc.com | google-site-verification=lTHvpojcfPIYXGkOqbku5TcOkpo52Exo-qWuQJi5bpw | 86400 | — |
| TXT | grc.com | v=spf1 ip4:4.79.142.192/28 a:client.grc.com a:grc.com -all | 86400 | — |
| CAA | grc.com | 0 issue "digicert.com" | 86400 | — |
| DMARC | _dmarc.grc.com | v=DMARC1; p=reject; sp=reject; rua=mailto:[email protected]; adkim=s; aspf=s; fo=1; pct=100 | 86400 | — |
TLS and certificates
HTTP response headers
| Header | Value |
|---|---|
| content-type | text/html; charset=utf-8 |
| server | GRC/IIS Hybrid Application Webserver |
| strict-transport-security | max-age=31536000; preload |
| x-frame-options | SAMEORIGIN |
| access-control-allow-origin | * |
| set-cookie | Redacted |
Identified technologies
Pages, Search and Sharing
| Meta description | Steve Gibson's and Gibson Research Corporation's Web homepage. |
|---|---|
| Canonical URL | Not detected |
| Language | English (default) |
| Twitter Card | Not detected |
Unknown
robots.txt (opens in a new tab)
4 rulesAll bots 0 allowed · 4 disallowed
- Disallow
/x - Disallow
/ppp - Disallow
/ppp? - Disallow
/cookies/forensics.htm
No matching rules.
Sitemaps
0No sitemaps found
Recent Updates
- Website images
- Screenshots
User reviews (0)