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Chapter 9: Troubleshooting and Repairing Networking

Chapter 9: Troubleshooting and Repairing Networking. Troubleshooting Network Protocols. 3 types of problems Software: Most often a configuration problem Physical: A failed NIC or cable External problems: Failures of network devices such as routers Use ping.exe and tracert.exe.

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Chapter 9: Troubleshooting and Repairing Networking

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  1. Chapter 9: Troubleshooting and Repairing Networking

  2. Troubleshooting Network Protocols • 3 types of problems • Software: Most often a configuration problem • Physical: A failed NIC or cable • External problems: Failures of network devices such as routers • Use ping.exe and tracert.exe

  3. Troubleshooting Network Services at the Client • Troubleshooting DNS • Verify DNS Configuration • Use nslookup.exe • Troubleshooting DHCP • Ipconfig.exe • /release • /renew

  4. Troubleshooting Remote Access • VPN Connections • Remote Desktop • Remote Assistance

  5. Troubleshooting VPN Connections • Check for Internet access • Verify there is no firewall blocking VPN • Verify VPN settings • Server name or address • Security settings • Network settings

  6. Troubleshooting Remote Desktop • Check for firewall • Verify general connectivity to the destination machine • Is the host using NLA?

  7. Troubleshooting Remote Assistance • Invitation files • Invitation Session • Windows Vista only session? • Verify the “Offer Remote Assistance Helpers” group

  8. Troubleshooting Wireless Networking • Verify settings • SSID • Wireless Security • Signal Issues • Too far from access point • Too many walls • Electronic Interference • Application Log

  9. Troubleshooting Network Security • Network Access Protection Issues • DHCP-NAP • Restricted State • Event log errors from NAP Agent Service • Verify Connectivity to NAP Server

  10. Troubleshooting Windows Firewall • Firewall blocking incorrect apps • Use command: netsh firewall show state verbose=enable • Check public vs. private network

  11. Using the Network Connection Diagnostics Tool • Based on the Network Diagnostics Framework • Automatically detects common network problems • Can often repair automatically

  12. Access to Network Resources • Files and Folders • Share permissions • Firewall blocking • Hidden and administrative shares • Access to Printers • Permissions • Drivers • Enable printer sharing

  13. Configuring Network Discovery and Sharing • Network and Sharing Center • Based on public vs. private network profile • Network Discovery allows machines to be seen • LLTD allows building of network map

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