# Check your website security from the public internet.

> Run a free read-only website security check for public hosts, DNS, HTTPS, TLS certificates, security headers, and email security. Get evidence and next steps.

Canonical: https://sentryxmonitor.com/services/website-security-check/
Last updated: 2026-08-06

Read-only public check

Enter a domain to review public hosts, DNS, HTTPS, TLS certificates, baseline security headers, and email-security records. You receive the observed evidence, why it matters, and a practical next step.

[Run the free check](https://sentryxmonitor.com/services/website-security-check/#scan) [Open a sample report](https://sentryxmonitor.com/report/)

Observed evidence public signals

**HTTPS and TLS**certificate valid, 18 days remaining

review

**Security headers**baseline response headers observed

checked

**Email security**SPF present, DMARC not detected

review

**Public hosts**12 resolving hosts observed

mapped

What the check covers

## A clear domain health report, not a vague score.

Every result is tied to a public observation. Sentryx separates confirmed evidence from items that need review and shows how each recommendation follows from the observed signal.

### Domain and host discovery

Map public hosts and supported DNS signals connected to the domain, then identify monitoring candidates and names that deserve an owner review.

### HTTPS and certificate health

Observe HTTPS availability, certificate expiration, issuer, hostname validity, trust chain, and TLS behavior.

### Web and email-security signals

Check baseline response headers and supported email-security records such as SPF and DMARC using public information.

How the report is produced

## Public evidence with explicit limits.

The free report is an outside-in snapshot, not a penetration test, safety certification, or guarantee that a website has no vulnerabilities.

**01****Start with public DNS**

Discover supported public records and validate hosts when resolution evidence is available.

**02****Observe public responses**

Check HTTPS, TLS certificate details, baseline response headers, and supported email-security signals.

**03****Explain the evidence**

Connect each finding to the exact public signal, confidence level, and recommended next action.

**04****Keep private systems private**

No login, exploitation, internal access, response-body storage, or port scanning in the free public report.

Frequently asked questions

## What this website security check means.

What does the website security check test?

The check observes public hosts, DNS records, HTTPS responses, TLS certificate details, baseline security headers, and email-security records.

Is this a penetration test?

No. It is a read-only outside-in snapshot. Sentryx does not log in, exploit systems, access private data, store response bodies, or run a port scan in the free public report.

Can I monitor a finding after the scan?

Yes. Selected hosts can become uptime, SSL certificate, HTTP, TCP, DNS, and supported change monitors.

Free website security check

## Check a domain now.

Read-only · no signup required · initial results in seconds

## Related
- [Home](https://sentryxmonitor.com/)