Skip navigation, view page content (access key = C)

Begin OSU masthead and toolbar

The Ohio State University
www.osu.edu
  1. Help
  2. Campus map
  3. Find people
  4. Webmail

Ohio State University logo Office of Information Technology Technology Support Center (8help)

Vista TCP Scaling and Login to OSU Secure Websites



Some Windows Vista machines are being shipped with Third Party Internet Security software (Mcafee, Norton, AOL, etc.) that are configured to deny access to Carmen, Buckeyelink, South Campus Gateway Fundamentals of Engineering for Honors Program(feh.osu.edu)FEH and Library Ez Proxy, and other OSU Internet Username-based login sites(Shibboleth). To regain access you can preform one of two solutions. One solution is to uninstall the Mcafee trial and download Mcafee Virus Scan 8.5 from the OSU Site Licensed Software site.

Solution #1:Mcafee Internet Security

Click Start->Control Panel. Select Programs and Features. Right-click on Mcafee Internet Security Suite 2007 and select uninstall. After the uninstall is successful, follow the instructions on the Site Licensed Software page to install Mcafee Virus Scan

WARNING: OIT does not recommend the use of any Windows-based computer, especially one connected to the Internet, without antivirus software installed. Please download and install Mcafee Virus Scan 8.5 from the SLS site as soon as possible after uninstalling Mcafee Internet Security Suite 2007.

Solution #2: Turning off TCP Auto-Tuning

To disable TCP Windows Scaling In Vista:

  1. Note: This command MUST be run as administrator
  2. Locate the Command Prompt icon/executable file under Start->Accessories
  3. Right-click on the icon and select "Run as administrator"
  4. Type:

    netsh interface tcp set global autotuninglevel=disabled

  5. Reboot the computer.
To enable TCP Windows Scaling In Vista:
  1. Note: This command MUST be run as administrator
  2. Locate the Command Prompt icon/executable file under Start->Accessories
  3. Right-click on the icon and select "Run as administrator"
  4. Type:

    netsh interface tcp set global autotuninglevel=normal

  5. Reboot the computer.
To verify the settings on the workstation, use the command:

netsh interface tcp show global

The results of this command should be: 

TCP Global Parameters
_____________________

Receive-Side Scaling State                 : enabled
Chimney Offload State                      : enabled
Receive Window Auto-Tuning Level           : disabled
Add-On Congestion Control Provider         : ctcp
ECN Capability                             : disabled
RFC 1323 Timestamps                        : disabled

The TCP Auto-Tuning feature currently is not widely beneficial to network users. In the future this feature may start to benefit network users after it is more widely accepted. For the complete Microsoft information on this feature consult the following Microsoft knowledge base article:

Microsoft Knowledge Base

At this time we are investigating additional solutions to this problem. Any feedback on this issue would be highly appreciated by the help desk staff and could help us find a solution more quickly. If you would like to report information regarding this problems please e-mail us at 8help@osu.edu answering the following questions:

  • Have you found an alternative solution to this problem?
  • Did you use the Work-Around listed above to fix this problem?
  • If so:
    • What is the brand of your computer?
    • Where did you purchase your computer?
    • Are you still experiencing difficulties accessing OSU sites?
If you have any further questions or concerns e-mail the Help Desk at 8help@osu.edu or call at 688-4357.

Current Record: 3292

Create Date: 02-20-2007
Last Reviewed: 02-10-2009
Please give us your feedback!
Was this document helpful?  




Home

 

return to top