Learn uptime monitoring
Practical guides on monitoring concepts, error fixes, and platform-specific setup — from the team behind SurePing.
Monitoring
What Is Port Monitoring? A Practical Guide
Port monitoring checks whether a specific TCP or UDP port is open and accepting connections. Learn how it works, when to use it, and how it differs from HTTP monitoring.
Read guideWhat Is Ping Monitoring? ICMP Explained
Ping monitoring uses ICMP to check if a host is reachable at the network layer. Learn how it works and when to use it instead of HTTP or port monitoring.
Read guideWhat Is Heartbeat Monitoring? (Cron Job Checks)
Heartbeat monitoring (dead man's switch) catches cron jobs that fail silently. Learn how it works and why it's the most reliable way to monitor scheduled tasks.
Read guideWhat Is HTTP Monitoring? Status Codes & Response Time
HTTP monitoring sends real requests and checks status codes, response time, and redirects. Learn how it works and when to use it over ping or port monitoring.
Read guideWhat Is SSL Certificate Monitoring? Expiry & Trust Checks
SSL certificate monitoring warns you before certs expire and catches trust chain problems. Learn how it works and why expiry alerts matter.
Read guideWhat Is Keyword Monitoring? Response Body Checks
Keyword monitoring checks the response body for a string's presence or absence. Learn how it catches pages that load but render broken.
Read guideWhat Is Synthetic Monitoring? Simulated User Journeys
Synthetic monitoring runs simulated browser transactions to test multi-step user journeys. Learn what it catches that simple checks miss.
Read guideICMP vs TCP Monitoring: Which Should You Use?
ICMP (ping) tests host reachability; TCP (port) tests whether a service accepts connections. Learn what each checks and when to use which.
Read guideError fixes
How to Fix 502 Bad Gateway (7 Proven Solutions)
A 502 Bad Gateway means your reverse proxy can't reach the upstream server. Work through these 7 fixes from most to least common.
Read guideHow to Fix 503 Service Unavailable
A 503 means the server is temporarily unable to handle the request — overload or maintenance. Here's how to diagnose and fix it.
Read guideHow to Fix 504 Gateway Timeout
A 504 means the proxy waited too long for the origin. Fix upstream timeouts, PHP max_execution_time, and load balancer config.
Read guideHow to Fix DNS_PROBE_FINISHED_NXDOMAIN
DNS_PROBE_FINISHED_NXDOMAIN means the domain doesn't resolve. Flush DNS, check hosts file, DNS server, VPN, and firewall.
Read guideHow to Fix "Connection Refused"
Connection refused means nothing is listening on the port, or a firewall is rejecting it. Diagnose the service, port, and binding.
Read guideHow to Fix SSL Certificate Errors
SSL errors: expired cert, wrong hostname, self-signed, incomplete chain, mixed content. Identify which one and fix it.
Read guideCron & heartbeat
What Is Cron Monitoring? Dead Man's Switch Explained
Cron monitoring uses a dead man's switch to catch scheduled jobs that fail silently. Learn how heartbeats and grace periods work.
Read guideHow to Monitor Cron Jobs: 5 Methods Compared
Five ways to monitor cron jobs: heartbeat URLs, log monitoring, exit code checks, wrapper scripts, and monitoring services. Compare approaches.
Read guideObservability
What Is Observability? Logs, Metrics, and Traces
Observability is the ability to understand a system's internal state from its external outputs: logs, metrics, and traces. Learn the three pillars.
Read guideObservability vs Monitoring: The Practical Difference
Monitoring tells you when something is wrong; observability helps you understand why. Learn the practical differences and how they fit together.
Read guidePlatform guides
WordPress Uptime Monitoring: What to Check
WordPress uptime monitoring: what to monitor (homepage, wp-admin, REST API, wp-cron) and why hosted monitoring beats plugin-based checks.
Read guideAPI Monitoring Guide: What to Check and How
API monitoring: what to check (status codes, response time, body, headers), REST vs GraphQL, OpenAPI spec import, and multi-step checks.
Read guideSaaS Uptime Monitoring: What to Watch and Why
SaaS uptime monitoring: what to monitor (web app, API, database, background jobs, SSL), SLA targets, incident response, and status pages.
Read guideHow to Monitor Your Shopify Store Uptime
Shopify monitoring: what to check (storefront, checkout, cart, admin), why Shopify's status page isn't enough, and how to set up alerts.
Read guideHow to Monitor a Next.js App (Uptime + API Checks)
Next.js monitoring: what to check (pages, API routes, SSR health), why 200 OK isn't enough for SSR, and how to catch render failures.
Read guideWebsite Monitoring for Small Businesses: A Practical Guide
Small business website monitoring: what to check, how much it costs, and why the cheapest option is usually the right one.
Read guideDowntime
The Real Cost of Website Downtime (2026 Guide)
How much does website downtime actually cost? Break down direct revenue loss, SEO impact, customer trust, and how to calculate your own number.
Read guideWhat Causes Website Downtime? 10 Common Causes
Server crashes, DNS failures, deploy errors, SSL expiry, traffic spikes, DDoS, database failures — the 10 most common causes of website downtime.
Read guideHow to Reduce Website Downtime: 9 Proven Strategies
From monitoring and SSL alerts to blue-green deploys and CDNs — 9 practical strategies to reduce website downtime.
Read guideHow Website Downtime Impacts SEO (And How to Recover)
Google drops rankings for sites with repeated downtime. Learn how downtime affects crawl frequency, indexation, and rankings — and how to recover.
Read guideWhat Is 99.9% Uptime? (And What It Really Costs You)
99.9% uptime sounds impressive — but it allows 43 minutes of downtime per month. Learn what uptime percentages actually mean.
Read guideMaintenance Pages: Best Practices During Planned Downtime
A good maintenance page preserves trust during planned downtime. Learn what to include, what to avoid, and how to serve it when your app is down.
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