--- title: Blog — page 6 of 9 description: Practical guides on monitoring, reliability, and performance — plus product news and lessons from the WatchFor team. canonical: https://watchfor.io/blog/page/6 --- # What we watch for — page 6 Practical guides on monitoring, reliability, and performance — plus product news and lessons from keeping our own systems online. [All](/blog)[Monitoring](/blog/category/monitoring)[Networking](/blog/category/networking)[Performance](/blog/category/performance)[Security](/blog/category/security)[Reliability](/blog/category/reliability)[Email](/blog/category/email)[DevOps](/blog/category/devops)[Engineering](/blog/category/engineering)[Guides](/blog/category/guides) [All articles](/blog/all) 229 posts · 167 article s · [62 tool guides](/blog/category/guides) · page 6 of 9 [ReliabilityMar 18, 2026 ## What is SRE? Site Reliability Engineering, explained SRE is what you get when you treat reliability as an engineering problem instead of a firefighting one. Here's what Site Reliability Engineering actually means, its core ideas, and how it differs from DevOps.WatchFor Team3 min read](/blog/what-is-sre)[PerformanceMar 14, 2026 ## What is TTFB (Time to First Byte) and how to improve it TTFB is the first number that tells you whether your backend is fast or slow. Here's what Time to First Byte measures, what's 'good', what makes it bad, and how to bring it down.WatchFor Team3 min read](/blog/ttfb-explained)[NetworkingMar 12, 2026 ## 404 Not Found: what it means and how to handle it 404 is the internet's most famous error — and unlike most, it's often nobody's emergency. Here's what it means, when it's fine, when it isn't, and how to handle it well.WatchFor Team3 min read](/blog/404-not-found)[NetworkingMar 10, 2026 ## 403 Forbidden: causes and how to fix it A 403 means the server understood you perfectly — and is refusing anyway. Here's what causes 'Forbidden', how it differs from 401, and how to track down the fix.WatchFor Team2 min read](/blog/403-forbidden)[NetworkingMar 08, 2026 ## 401 vs 403: Unauthorized vs Forbidden 401 and 403 are the two 'you can't have this' codes — and they're constantly confused. Here's the simple rule for telling them apart, with examples.WatchFor Team3 min read](/blog/401-vs-403)[NetworkingMar 06, 2026 ## 500 Internal Server Error: what it means and how to fix it 500 is the server's way of saying 'something went wrong and I don't know how to explain it.' Here's what causes it, how to find the real error, and how to stop it recurring.WatchFor Team3 min read](/blog/500-internal-server-error)[NetworkingMar 04, 2026 ## 301 vs 302 Redirects: which one should you use? Both send visitors from one URL to another — but to search engines they mean very different things. Use the wrong one and you can quietly tank your SEO. Here's the difference.WatchFor Team3 min read](/blog/301-vs-302-redirects)[MonitoringMar 02, 2026 ## CORS Errors Explained (and how to fix them) Every web developer meets the dreaded 'blocked by CORS policy' error. It's not a bug — it's a security feature. Here's what CORS is, why the browser blocks your request, and how to fix it properly.WatchFor Team3 min read](/blog/cors-errors-explained)[PerformanceFeb 28, 2026 ## ERR_TOO_MANY_REDIRECTS: causes and how to fix it When a page keeps redirecting to itself, the browser gives up with 'too many redirects'. Here's why redirect loops happen and the usual culprits behind them.WatchFor Team3 min read](/blog/too-many-redirects)[SecurityFeb 26, 2026 ## SSL/TLS Handshake Failed: causes and how to fix it When the secure connection can't be agreed, you get a handshake failure — and the page never loads. Here's what goes wrong during the TLS handshake, and how to fix each cause.WatchFor Team3 min read](/blog/ssl-handshake-failed)[SecurityFeb 24, 2026 ## Mixed Content Warnings: what they are and how to fix them Your site is on HTTPS, but the padlock has a warning — or images won't load. That's mixed content: a secure page pulling in insecure resources. Here's how to find and fix it.WatchFor Team3 min read](/blog/mixed-content-warnings)[NetworkingFeb 22, 2026 ## ERR_CONNECTION_REFUSED: what it means and how to fix it Connection refused means you reached the server's door — and it slammed shut. Nothing is listening (or something is blocking). Here's how to track down which.WatchFor Team3 min read](/blog/connection-refused)[MonitoringFeb 20, 2026 ## How to Monitor a Website (a step-by-step guide) Monitoring your website sounds technical, but the essentials take minutes. Here's a plain, step-by-step guide to going from 'I hope it's up' to 'I'll know the second it isn't'.WatchFor Team3 min read](/blog/how-to-monitor-a-website)[MonitoringFeb 18, 2026 ## Server Monitoring Basics: CPU, memory, disk and network Before an app falls over, the server usually shows it coming. Here are the four resources to always watch — and what 'healthy' versus 'about to break' looks like for each.WatchFor Team3 min read](/blog/server-monitoring-basics)[MonitoringFeb 16, 2026 ## Database Monitoring: what to watch (and why) When the database struggles, everything that depends on it struggles too — usually as timeouts and slow pages. Here's what to monitor so the DB never becomes your silent bottleneck.WatchFor Team3 min read](/blog/database-monitoring)[NetworkingFeb 14, 2026 ## What is a Network Port? (and how to monitor one) An IP address gets you to the right machine; a port gets you to the right service on it. Here's what ports are, the common ones, and why monitoring them catches outages a website check misses.WatchFor Team3 min read](/blog/what-is-a-network-port)[MonitoringFeb 12, 2026 ## Keyword Monitoring: catching the '200 OK but broken' page A page can return a perfect 200 OK and still be completely broken. Keyword monitoring checks the actual content — so a blank page, an error, or a defacement doesn't slip past your checks.WatchFor Team3 min read](/blog/keyword-monitoring)[MonitoringFeb 10, 2026 ## Monitoring Microservices: seeing health across many moving parts Microservices trade one big app for dozens of small ones — and turn one dashboard into a puzzle. Here's how to monitor a distributed system without drowning in noise.WatchFor Team3 min read](/blog/monitoring-microservices)[MonitoringFeb 08, 2026 ## Monitoring Kubernetes: from pods to nodes to probes Kubernetes is brilliant at hiding failures — it restarts and reschedules so smoothly you may not notice trouble until it's everywhere. Here's what to watch so the magic doesn't mask a problem.WatchFor Team3 min read](/blog/monitoring-kubernetes)[MonitoringFeb 06, 2026 ## Monitoring Serverless (Lambda and friends) Serverless means no servers to watch — and a few new things that can go wrong. Here's what to monitor when your code runs as functions: cold starts, duration, errors and throttles.WatchFor Team3 min read](/blog/monitoring-serverless) --- Canonical page: https://watchfor.io/blog/page/6 · Site guide: https://watchfor.io/llms.txt