Why Do Websites
Go Down?

1. The Reality of Downtime

In a perfect world, websites would be online 100% of the time. However, the internet is built on a fragile layer of interconnected physical hardware, fiber optic cables, and evolving software protocols. When even one of these links breaks, it results in an "Outage."

Downtime isn't just an inconvenience; it's a massive financial burden. For enterprise-scale sites, a single minute of downtime can cost upwards of $5,600 according to Gartner. Understanding why these crashes happen is the first step toward achieving 99.99% availability.

2. DNS Failures: The Broken Map

Think of DNS as the GPS of the internet. If your DNS records are misconfigured, or if your DNS provider goes down, users will type your name into their browser and be met with a blank screen. This is a common cause of "down for some, but not for others" outages.

• Expired Domains: Forgetting to renew your domain name is a classic, avoidable mistake.
• TTL Lag: High Time To Live (TTL) values can delay necessary IP updates.
• Provider Attacks: When giants like Dyn or GoDaddy get attacked, millions of unrelated websites go dark simultaneously.

3. Server Overload & Viral Traffic

Sometimes a site goes down because it's *too* popular. This is often called the "Reddit Hug of Death." When a massive surge of visitors hits a server that wasn't prepared for it, the CPU and RAM hit 100% usage, and the server starts refusing new connections.

4. DDoS Attacks (Cyber Warfare)

A **Distributed Denial of Service (DDoS)** attack is a malicious attempt to disrupt normal traffic by overwhelming the target with a flood of internet traffic from a "botnet." It’s like a traffic jam clogging up a highway, preventing regular cars from reaching their destination.

Modern attacks can reach several **Terabits per second**, requiring advanced scrubbing centers provided by companies like Cloudflare or Akamai to mitigate.

5. BGP Routing Errors

BGP (Border Gateway Protocol) is the routing protocol for the entire internet. It tells data packets which path to take to get from Point A to Point B. If an ISP incorrectly announces a route—known as **BGP Hijacking** or a "leak"—it can effectively erase a website from the global internet map.

Famous outages, such as the 2021 Facebook/Instagram blackout, were primarily caused by BGP configuration errors that stopped the world from reaching their servers.

6. Provider Dependency (The AWS Effect)

In 2026, most websites don't own their own physical servers. They rent space from **Cloud Providers** like Amazon Web Services (AWS), Google Cloud (GCP), or Microsoft Azure. While these giants are reliable, they are not invincible.

When an AWS "Region" (like us-east-1) has an issue, it can knock out thousands of apps, smart home devices, and payment systems at the same time. You can monitor these third-party giants live on our Global Status Map.

7. Human Error (Code & Config)

Ironically, the most common reason a site goes down is the people building it. A simple typo in a configuration file or a "bad deploy" of code can trigger infinite loops, memory leaks, or database deadlocks.

• Broken Database Queries: A slow query can lock your entire user table.
• Plugin Conflicts: Common in WordPress sites where two tools fight for resources.
• Failed Updates: Updating your server OS without testing dependencies first.