Windows 7 / Networking

Remote Assistance and IP Ports Used

The ports used by a Remote Assistance session depend on which version of Windows is running on the two computers involved in the session. Specifically:

  • Windows 7 to Windows 7, Windows 7 to Windows Vista, or Windows Vista to Windows Vista Dynamic ports allocated by the system in the range TCP/UDP 49152-65535
  • Windows 7 to Windows XP or Windows Vista to Windows XP Port 3389 TCP (local/remote)

In addition, the Offer RA via DCOM scenario uses port 135 (TCP).

Note If you are concerned about opening the DCOM port (TCP port 135) on your corporate firewall and want to avoid doing this but still want to be able to offer Remote Assistance to remote users, you can do so by using Authenticated IPsec Bypass as described in http://technet.microsoft.com/en-us/library/cc753463.aspx.

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In this tutorial:

  1. Supporting Users with Remote Assistance
  2. Understanding Remote Assistance
  3. Remote Assistance vs. Remote Desktop
  4. Improvements to Remote Assistance in Windows 7
  5. How Remote Assistance Works in Windows
  6. Remote Assistance Operational States
  7. User vs. Helper Functionality
  8. Remote Assistance and NAT Traversal
  9. Remote Assistance and IP Ports Used
  10. Remote Assistance and Windows Firewall
  11. Remote Assistance and the Secure Desktop
  12. Remote Assistance Logging
  13. Purpose of Remote Assistance Session Logging
  14. Session Log Path and Naming Convention
  15. Using Remote Assistance in the Enterprise
  16. Using Remote Assistance in the Corporate Help Desk Environment
  17. Other Possible Remote Assistance Usage Scenarios
  18. Interoperability with Remote Assistance in Windows Vista
  19. Interoperability with Remote Assistance in Windows XP
  20. Implementing and Managing Remote Assistance
  21. Initiating Remote Assistance Sessions
  22. Initiating Remote Assistance from the GUI
  23. Initiating Remote Assistance from the Command Line
  24. Managing Remote Assistance Using Group Policy
  25. Configuring Remote Assistance in Unmanaged Environments
  26. Additional Registry Settings for Configuring Remote Assistance