Troubleshooting and Fixing Network Issues

From time to time, you may encounter network problems that prevent you from accessing your website, email, or other online services. This guide introduces the most common troubleshooting steps to help you identify and resolve connectivity issues.

Common Causes of Network Issues

Problems with your local device (Wi-Fi, firewall, or browser).
Issues with your ISP (Internet Service Provider).
DNS misconfigurations or propagation delays.
Routing problems between your ISP and the hosting server.
Temporary outages on the hosting server itself.

Step 1: Check Your Local Setup

Restart your modem/router.
Test another device (phone, tablet, or laptop).
Switch to a different network (e.g., mobile hotspot) to rule out local ISP issues.

Step 2: Test Connectivity

Use ping to check if the server is reachable:
Terminal window
```
ping yourdomain.com
```
Use traceroute (or tracert on Windows) to see the path packets take:
Terminal window
```
traceroute yourdomain.com
```
Look for timeouts or high latency at specific hops.

Step 3: Troubleshoot DNS

Use dig or nslookup to confirm your domain resolves to the correct IP:
Terminal window
```
nslookup yourdomain.com
```
If DNS records were recently updated, allow 24–48 hours for propagation.
Try switching to a public DNS service (Google DNS 8.8.8.8, Cloudflare DNS 1.1.1.1).

Step 4: Clear Cache and DNS

Clear your browser cache and cookies.
Flush your local DNS cache:
Windows: ipconfig /flushdns
macOS: sudo dscacheutil - flushcache; sudo killall -HUP mDNSResponder
Linux: sudo systemd-resolve –flush-caches

Step 5 : Rule Out Security Software

Temporarily disable firewalls, VPNs, or antivirus software that may block connections.
If the issue resolves, adjust the software’s settings to allow access.