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professormesser.com
Access Professor Messer’s free CompTIA A+, Network+, and Security+ training videos, study notes, and study group replays. Start your IT certification training.
At a glance
- Category
- Security & Privacy
- Language
- English
- Paid-content signal
- No paid content foundObserved
- Registered
- 2005
- Hosting
- CloudflareInferred
- HTTPS certificate trusted
- PassedObserved
- Last updated
Related questions
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Website Overview
Identifiable technologies and additional version or configuration signals make the service easier to fingerprint, which may help targeted scanners narrow their checks. An established domain and managed infrastructure suggest continuity of operations and may support dependable delivery, although neither guarantees service quality.
Domain and Registration
Registered in 2005, this domain has about 21 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 Cloudflare, indicating managed DNS hosting. MX records point to the Fastmail email service. No CNAME was found; the observed records resolve directly to addresses. SPF and DMARC are configured. DKIM status is unknown. TXT records include verification markers for Google. Such markers may also remain after a service stops being used.
TLS and Certificates
The public key uses EC with 256 bits. The server supplied a complete certificate chain. No organization name is present in the certificate; the available fields are consistent with domain validation. The certificate was issued by Let's Encrypt, commonly associated with automated certificate services. The certificate's total validity is about 89 days, consistent with a short renewal cycle.
HTTP and Browser Security
The response lacks these common security headers: HSTS, CSP, X-Content-Type-Options, Permissions-Policy, clickjacking protection. No X-Powered-By header was found, reducing one common source of backend fingerprinting information. The cf-ray response header indicates a CDN or caching proxy in the delivery path. No obvious internal addresses or debug information were found in the headers. The Server header identifies cloudflare without an exact version.
Technology Stack Analysis
The public page identifies Site Kit by Google 1.188.0, WordPress, jQuery, Google Tag Manager, Cloudflare, with exact versions exposed for 1 technologies. These details can narrow vulnerability checks, although exposure alone is not a vulnerability.
Search and Social Sharing
The title has 83 characters and may be truncated in search results. The Generator tag identifies Site Kit by Google 1.188.0, making the publishing system easier to fingerprint. Twitter Card metadata is configured. JSON-LD includes Organization data, helping describe the organization as an entity. A meta description is present, with 159 characters.
Hosting and Email
Cloudflare
FastmailRegistration details
| Registrar | Tucows Domains Inc. |
|---|---|
| Registered | 2005-04-10 |
| Expires | 2028-04-10 |
| Domain status | client transfer prohibited、client update prohibited |
| Nameservers | eva.ns.cloudflare.com、mark.ns.cloudflare.com |
| DNSSEC | unsigned |
DNS records
| Type | Name | Value | TTL | Priority |
|---|---|---|---|---|
| A | www.professormesser.com | 104.20.22.204 | 300 | — |
| A | www.professormesser.com | 172.66.174.118 | 300 | — |
| MX | professormesser.com | in1-smtp.messagingengine.com | 300 | 10 |
| MX | professormesser.com | in2-smtp.messagingengine.com | 300 | 20 |
| NS | professormesser.com | eva.ns.cloudflare.com | 86400 | — |
| NS | professormesser.com | mark.ns.cloudflare.com | 86400 | — |
| TXT | professormesser.com | google-site-verification=D-5VZrtDCTkek0eOQ7lQKPI2DDIRSmhZ8V1T7-TSti4 | 300 | — |
| TXT | professormesser.com | google-site-verification=_EyKwPZlEDHGqdM5bGyEWH3uhcdv0x867Wj5BHdKkkc | 300 | — |
| TXT | professormesser.com | stripe-verification=4dd3efa6688d4cfe0e2c43d5eb7a815803fc1b91789ca1f49e3f9469c35972eb | 300 | — |
| TXT | professormesser.com | v=spf1 include:mailgun.org include:send.aweber.com include:spf.messagingengine.com include:emailsrvr.com ~all | 300 | — |
| DMARC | _dmarc.professormesser.com | v=DMARC1; p=none; sp=none; rua=mailto:[email protected] | 300 | — |
TLS and certificates
HTTP response headers
| Header | Value |
|---|---|
| content-type | text/html; charset=UTF-8 |
| cache-control | max-age=3, must-revalidate |
| server | cloudflare |
| referrer-policy | strict-origin-when-cross-origin |
Identified technologies
Pages, Search and Sharing
| Meta description | Access Professor Messer’s free CompTIA A+, Network+, and Security+ training videos, study notes, and study group replays. Start your IT certification training. |
|---|---|
| Canonical URL | https://www.professormesser.com/ |
| Language | English (default) |
| Twitter Card | summary_large_image |
Social Sharing Preview
12 fields
robots.txt (opens in a new tab)
6 rulesmj12bot 0 allowed · 1 disallowed
- Disallow
/
aboundexbot 0 allowed · 1 disallowed
- Disallow
/
dotbot 0 allowed · 1 disallowed
- Disallow
/
All bots 1 allowed · 0 disallowed
- Allow
/
grapeshot 0 allowed · 1 disallowed
- Disallow
/
httrack 0 allowed · 1 disallowed
- Disallow
/
No matching rules.
Sitemaps
1Recent Updates
- Website images
- Screenshots
- Network details
- Website Technologies
- Pages and Search Information
- TLS and certificates
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