Troubleshooting guides
Seven concrete reasons a site goes down, and exactly what to check for each one. Start with a live check, then work through the guide that matches what you're seeing.
DNS not resolving
Your domain's DNS records aren't pointing anywhere valid, so browsers can't find the server. Here's how to diagnose and fix it.
HOSTINGHosting or server outage
DNS resolves fine but the site still won't load. Here's how to confirm it's your host, and what to do while you wait it out.
REGISTRARExpired domain
An expired domain doesn't just misbehave, it stops resolving entirely. Here's how to tell, and how domain expiry actually works.
TLS/SSLSSL certificate problems
An expired, misconfigured, or mismatched certificate makes browsers refuse the connection outright. Here's how to diagnose which.
SECURITYFirewall blocking traffic
Sometimes a site isn't down at all — a firewall, WAF, or bot-protection rule is blocking legitimate visitors by mistake.
PERFORMANCEServer overload
A sudden spike in visitors can exhaust a server's resources faster than it can respond. Here's how to spot it and what helps.
MIGRATIONRecent DNS or hosting migration
A site that works intermittently right after a move between hosts is almost always a propagation issue, not a broken migration.