What to monitor (the essential four)
- Uptime / HTTP status — is the site responding?
- SSL certificate — is it valid and not expiring soon?
- DNS — do A, CNAME, MX records match expectations?
- Reputation / blacklists — is the domain or IP flagged?
A practical primer on website monitoring: what to monitor, how often to check, what alerts actually matter, and how to get started without paying for an enterprise platform.
Frequency drives how fast you see issues. Every 5 minutes is the sensible floor for production sites. Sub-minute monitoring helps for revenue-critical paths but multiplies false positives if you only check from one region.
Run through these steps in order. Each step links to the right diagnostic tool.
Baseline your site
Run uptime, SSL, DNS, and blacklist checks now to capture a healthy baseline.
Open Website SafetyVerify your SSL renewal cadence
Find the expiry date and set a reminder for 30 days before.
Open SSL CheckerSet up continuous monitoring
Save the checks and let the platform alert you on changes.
Open DashboardPublic sites: every 1–5 minutes. Internal services: 5–15 minutes. Status pages: real-time via webhooks.
SSL certificate expiry. Outages from expired certs are entirely preventable but cause hours of downtime every week somewhere.
For a marketing site, HTTP ping plus SSL and DNS is plenty. For checkout flows or APIs, add synthetic transactions.
Alert on confirmed multi-region failures, group by service, and route low-severity signals to a daily digest instead of paging.
Monitor it continuously
Save this check, get alerts on changes, and track multiple domains in one dashboard.