{"id":28343,"date":"2025-01-14T14:59:22","date_gmt":"2025-01-14T14:59:22","guid":{"rendered":"https:\/\/www.dotcom-monitor.com\/blog\/?p=28343"},"modified":"2026-08-22T22:46:28","modified_gmt":"2026-08-22T22:46:28","slug":"how-to-monitor-website-uptime","status":"publish","type":"post","link":"https:\/\/www.dotcom-monitor.com\/blog\/how-to-monitor-website-uptime\/","title":{"rendered":"How to Monitor Website Uptime: A Step-by-Step Guide"},"content":{"rendered":"
\"Illustration
Uptime monitoring fires scheduled checks at your site from outside your network and alerts the moment a response comes back wrong.<\/figcaption><\/figure>\n

Most teams find out their site is down from a customer email, a social post, or a sales dashboard that quietly flatlines. By the time a human notices, the outage has been running for however long it took someone to complain, and the damage started well before that.<\/p>\n

Uptime monitoring closes that gap with a simple mechanism: automated checks fired at your site on a schedule, from outside your own network, that raise an alert the moment a response comes back wrong or not at all. The setup takes minutes. Getting it to tell the truth takes a handful of decisions most tutorials skip, because a monitor left on defaults misses real failures and cries wolf about imaginary ones.<\/p>\n

This guide walks through those decisions in seven steps: defining what “up” means, choosing check types, setting frequency, verifying from multiple locations, wiring alerts, filtering false positives, and reporting uptime against an SLA.<\/p>\n

One idea ties the seven steps together: treat the monitor as a truth stack, not a single check. DNS proves the name resolves, TCP proves the service is reachable, TLS proves browsers will trust it, HTTP proves the application responds, content validation proves the right page rendered, and journey monitoring proves a visitor can finish the task. Build the stack from the outside in, and every alert names the layer that failed instead of shrugging “site down.”<\/p>\n

Step 1: Define What “Up” Means for Your Site<\/h2>\n

The laziest definition of up is “the server answers.” It is also the one that burns people. A host can answer ping while the web server process is dead. A web server can return HTTP 200 while serving a maintenance page, a half-rendered template, or somebody else’s content after a DNS hijack. None of those count as up to a visitor.<\/p>\n

It helps to name the three states of down. Hard down: the host answers nothing at all. Soft down: the server returns a 200 while serving a database error, a blank template, or someone else’s content after a DNS hijack. Phantom down: your servers are healthy, but a broken CDN edge or a regional routing failure hides the site from one slice of your audience. A monitor that only catches hard down misses the two states that happen more often.<\/p>\n

So before you configure anything, write down what has to be true for your site to be genuinely available:<\/p>\n