Network Troubleshooting Guides
Welcome to the Network Troubleshooting Hub — your go-to section for fixing internet and connectivity problems. Explore these step-by-step guides covering Wi-Fi, Ethernet, VPN, DNS, and other networking issues.
Fix Wi-Fi Connection Problems
Resolve common wireless connectivity issues, authentication errors, and “no internet” messages.
Ethernet / LAN Not Working
Diagnose cable, port, or adapter problems when your wired network stops working.
VPN Connection Errors
Fix VPN error codes, split tunneling problems, and SSL VPN configuration issues.
DNS Problems
Flush DNS, change DNS servers, and resolve name lookup failures for websites and services.
Slow Network Speed
Identify what’s slowing your connection and improve Wi-Fi signal and performance.
IP Configuration Errors
Fix “no valid IP configuration” issues and reset the TCP/IP stack in Windows or macOS.
Can’t Reach the Internet
Check gateway reachability, DNS, and firewall rules for full connectivity recovery.
Proxy Server Issues
Disable or adjust proxy settings causing network or browser connection failures.
Network Printer Troubles
Reconnect or reconfigure printers that aren’t appearing or responding over the network.
Recommended Tools & Commands
- ping — Test network reachability.
- ipconfig /all — View all IP configuration details.
- nslookup — Check DNS name resolution.
- tracert — Trace the route packets take to a destination.
- netsh winsock reset — Reset network stack for Windows.
- Test-NetConnection — PowerShell command for testing ports and connectivity.