Troubleshooting IIS Testing a Web Site Connected to the Internet Testing a Web Site on Your Intranet Resolving IIS Problems - SkillPoint IT | Free IT Training & Managed Services Forum

Helpful Commands for Troubleshooting:

mianshahzad10 — Wed, 23 Jul 2025 06:54:53 +0000

# Check IIS service status
Get-Service W3SVC

# Restart IIS
iisreset

# View active ports
netstat -aon

# Check log files
C:\inetpub\logs\LogFiles\

mianshahzad10 — Wed, 23 Jul 2025 06:54:21 +0000

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

mianshahzad10 — Wed, 23 Jul 2025 06:53:44 +0000

Use Server IP or Hostname:
- Test from another device on the network:
  http:// or http://hostname
Add DNS or Hosts Entry (Optional):
- Update DNS or add C:\Windows\System32\drivers\etc\hosts entries for name-based access.
Disable Windows Firewall (for testing only):
- Temporarily disable to see if it blocks traffic:

netsh advfirewall set allprofiles state off

Check Binding Configuration in IIS:

Ensure the correct IP, port, and host name are set in site bindings.

mianshahzad10 — Wed, 23 Jul 2025 06:52:54 +0000

Verify Public IP Mapping:
- Ensure the public IP is correctly mapped to your IIS server via NAT or port forwarding.
Check Firewall & Port Access:
- Port 80 (HTTP) or 443 (HTTPS) must be open on both server and network firewall.
- Use this command to test:

telnet yourdomain.com 80

Use Browser & Ping Tools:
- Try accessing: http://yourdomain.com
- Use tools like:
  - https://downforeveryoneorjustme.com
  - tracert yourdomain.com
Check DNS Propagation:
- Verify DNS records using:

nslookup yourdomain.com