Uptime Monitoring Blog
Ideas and lessons on uptime, alerting, SSL and reliability from the Upmonora team.
Overview - Uptime Monitoring Blog
ERR_TOO_MANY_REDIRECTS: Fix the Redirect Loop Fast
ERR_TOO_MANY_REDIRECTS means your site redirects in a loop. Find the looping hop with curl in 60 seconds, then apply the exact Cloudflare or WordPress fix.
Blog · Nov 4, 2026HTTP Status Codes Cheat Sheet: The Codes That Matter
HTTP status codes cheat sheet: the five classes, the 22 codes you will really meet, which ones matter for SEO and monitoring, and how to check a URL.
Blog · Nov 2, 2026What Is a Status Page and What Should You Put on It?
A status page shows customers whether your service is up and what you are doing when it is not. What to put on it, how to write updates and set one up.
Blog · Oct 30, 2026Uptime Monitoring Interval: 30s vs 1 Min vs 5 Min
Which uptime monitoring interval to use: the detection-delay maths for 30s, 1 min and 5 min checks, why confirmations double it, and a table by site type.
Blog · Oct 28, 2026Cloudflare Error 520, 521, 522, 524: Causes and Fixes
What Cloudflare errors 520, 521, 522, 523, 524, 525 and 526 mean, the usual cause at your origin server, how to test the origin directly, and each fix.
Blog · Oct 26, 2026500 Internal Server Error: What It Means and How to Fix It
A 500 Internal Server Error means the server failed while handling a request. Common causes, the log commands that find the real one, and fixes by stack.
Blog · Oct 23, 2026Best Uptime Monitoring Tools in 2026 (Free and Paid)
The best uptime monitoring tools in 2026 compared on free tier, check interval, price, regions, alerts and status pages. Prices checked October 2026.
Blog · Oct 21, 2026
Critical PHP RCE (CVE-2026-109618): How to Patch Now
CVE-2026-109618 lets attackers run code on PHP servers through out-of-memory errors. Affected versions, how to check yours, and how to patch today.
Blog · Oct 21, 2026What Is a Good Website Response Time (TTFB)?
What counts as a good server response time and TTFB, how it affects Core Web Vitals and SEO, how to measure it, and the fixes that make the biggest difference.
Blog · Oct 19, 2026WordPress Site Down? A Step-by-Step Recovery Checklist
White screen, "critical error", database connection error or 5xx? A calm, ordered checklist to get a WordPress site back online fast, and keep it up.
Blog · Oct 14, 2026504 Gateway Timeout: What Causes It and How to Fix It
A 504 Gateway Timeout means your proxy or CDN gave up waiting for the app server. How to find the slow layer, which timeouts to check, and real fixes.
Blog · Oct 12, 2026How to Check an SSL Certificate Expiry Date (4 Ways)
Check when an SSL/TLS certificate expires: in the browser, with OpenSSL or curl, or automatically - plus the chain and hostname checks that catch other breaks.
Blog · Oct 7, 2026How to Monitor an API Endpoint: Health Checks That Work
What to check on an API (availability, status codes, latency, SSL), how to design a /health endpoint, sensible thresholds, and alerts that don't cry wolf.
Blog · Oct 5, 2026503 Service Unavailable: Causes, Fixes and How to Prevent It
A 503 means the server is up but can't handle the request right now. Common causes (overload, maintenance, rate limits), how to diagnose each and fix it.
Blog · Sep 30, 2026The Real Cost of Website Downtime (and How to Calculate It)
A simple formula for what an hour of downtime costs your business: lost revenue, wasted ad spend, staff time, SLA credits and SEO. With worked examples.
Blog · Sep 28, 2026502 Bad Gateway Error: What It Means and How to Fix It
A 502 Bad Gateway means a proxy got an invalid response from your app server. The 8 most common causes, how to find which one it is, and how to fix each.
Blog · Sep 25, 2026How to Check if a Website Is Down for Everyone or Just You
Is the site down or is it just you? 7 quick checks that answer it in under two minutes, what each result means, and how to get alerted automatically next time.
Blog · Sep 15, 2026SSL Certificate Expiry: The Outage You Can Schedule Away
Expired certificates take sites offline for every visitor at once. Why auto-renewal still fails, and how to get warned 30, 14, 7 and 1 day ahead.
Blog · Sep 8, 2026Why One Failed Check Should Never Wake You Up
Alert fatigue kills on-call teams. How failure thresholds, recovery detection and maintenance windows cut false positives without hiding real outages.
Blog · Sep 1, 2026How Uptime Is Calculated (and Why Most Dashboards Get It Wrong)
Check-based vs. duration-based uptime, what 99.9% really allows, and why your uptime report should show both numbers.
Know when your website goes down - before your customers tell you.
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