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Troubleshooting IIS Testing a Web Site Connected to the Internet Testing a Web Site on Your Intranet Resolving IIS Problems
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23/07/2025 6:54 am
| Problem | Solution |
|---|
| ❌ 404 Not Found | - Check if file exists in site root - Verify default document |
| 🔐 403 Forbidden | - Check NTFS and IIS permissions - Ensure IIS_IUSRS has read access |
| 🌐 Site Not Loading | - Restart IIS: iisreset- Check bindings and firewall |
| ⚠️ Application Pool Crashes | - Check event logs - Recycle or recreate the app pool |
| 🔒 SSL Certificate Errors | - Reinstall certificate - Bind HTTPS to site correctly |
| 🚫 Port Already in Use | - Run `netstat -aon |
| 🧭 DNS Name Not Resolving | - Add host entry - Check DNS server settings |