What Is Website Monitoring?
Website monitoring is the continuous checking of a website’s availability, configuration, security and important changes. It helps detect problems such as downtime, expired SSL certificates, DNS changes and broken security controls before they become bigger issues.
What Does Website Monitoring Check?
Uptime
Uptime monitoring checks whether your website is reachable and responding as expected. It can detect outages, connection failures and unexpected HTTP errors.
Security Headers
Security header checks look for browser protections such as HSTS, Content-Security-Policy and other HTTP security controls that help reduce common web risks.
SSL/TLS
SSL monitoring checks whether your certificate is valid, trusted and approaching expiration. An expired certificate can make a website appear unsafe or unavailable to visitors.
DNS
DNS monitoring checks important DNS records and detects unexpected changes. These can include records used for your website, email and domain authentication, including SPF, DKIM and DMARC.
Domain
Domain monitoring can track registration and expiration information and help identify unexpected changes that could affect control of a domain.
Content
Content monitoring detects meaningful changes to pages you expect to remain stable. Unexpected changes can indicate an accidental deployment, a broken application or an unauthorized modification.
IP Reputation
Checks whether your server IP appears on public reputation databases and blocklists, helping you detect spam, abuse, or reputation problems.
Open Ports
Port monitoring can identify publicly reachable network services associated with a website or server and help you notice services that were not expected to be exposed.
Why Is Website Monitoring Important?
A website can fail in ways that are not immediately visible to its owner. A page may still load while its SSL certificate is about to expire, DNS records have changed, security headers are missing or important content has been modified. Monitoring provides an external view of the website and can alert you when something changes.
What Is the Difference Between Uptime Monitoring and Website Monitoring?
Uptime monitoring answers a relatively simple question: “Is the website reachable?” Website monitoring goes further. It can check the certificate, DNS configuration, security headers, domain information, content and other characteristics of the site.
How Can You Check a Website for Problems?
A basic check can start with opening the website and verifying that it responds correctly. More complete monitoring combines HTTP requests with checks of TLS certificates, DNS records, HTTP headers, domain information and other externally observable properties.
How Often Should a Website Be Checked?
The right monitoring interval depends on how important the website is and how quickly problems need to be detected. More frequent checks reduce the time between a problem occurring and the alert being generated, while less critical sites may need less frequent monitoring.
What Should You Do When Something Changes?
First determine whether the change was expected. If it was caused by a deployment, DNS update, certificate renewal or other planned action, no further action may be needed. If the change was unexpected, investigate it promptly and check related systems such as DNS, hosting, source code and domain administration.
How Viglar Monitors Your Website
Viglar is an external website, domain and security monitoring service. It combines multiple checks so you can see more than just whether a website is online. Viglar monitors uptime, SSL, DNS, security headers, reputation, open ports, WHOIS, content and other externally observable signals.
Want to check a website now?
Run a quick external check with Viglar and see what your website exposes right now.
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