Is Discord Down? Check Status and Local Issues
Check Discord's official component status, compare independent signals, isolate app, API, voice, regional, and local-network issues, and subscribe to incidents.
Cloudflare 520–526 Errors Explained: Causes and Fixes
What Cloudflare's 520, 521, 522, 523, 524, 525, and 526 errors mean, why they happen between Cloudflare and origin, and how to diagnose and fix each one.
Kubernetes CrashLoopBackOff: Causes and How to Fix It
What CrashLoopBackOff means, the common reasons a pod keeps restarting, and a step-by-step way to diagnose and fix the crash loop with kubectl.
Kubernetes ImagePullBackOff and ErrImagePull: How to Fix
What ImagePullBackOff and ErrImagePull mean, why Kubernetes can't pull your container image, and how to diagnose and fix the most common causes.
Kubernetes OOMKilled (Exit Code 137): Causes and Fixes
Why Kubernetes kills pods with OOMKilled and exit code 137, how memory requests and limits cause it, and how to diagnose and fix out-of-memory restarts.
Connection Refused vs Connection Timed Out vs Reset (Fix Guide)
Fix connection refused (TCP RST), connection timed out, and connection reset errors. Step-by-step diagnostic checklist to test ports, firewalls, and servers.
Traceroute Explained: Diagnosing Network Path Problems
Learn how traceroute probes TTL hops, why RTT and loss can mislead, and how to combine TCP/ICMP traces, MTR, and endpoint tests during diagnosis.
Docker Container Unhealthy: How to Debug Health Checks
Why a Docker container shows 'unhealthy', how to read HEALTHCHECK logs, debug docker-compose health checks, and fix the most common causes fast.
Website Down After the Checker: DNS, SSL, Host
After the website down checker confirms a real outage, isolate DNS, TLS, hosting, or a local failure and fix the failing layer.
How to Check if a Port Is Open: Windows, Mac, Linux & Online
Test if a TCP port is open online with our free port checker, or run nc, nmap, telnet, and Test-NetConnection locally on Windows, macOS, and Linux.
5xx Server Errors: 500, 502, 503, 504 Explained
Understand 500, 502, 503 and 504 server errors, diagnose application, proxy and upstream causes, and monitor status, body and error-rate patterns.
Is My Website Down? A 60-Second Outside Check
Run a 60-second outside check to separate a real, regional, or local website outage using another network, DNS, HTTP headers, and external probes.