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10060 Connection timed out error with proxy server or ISA Server on slow link

This article was previously published under Q191143
Problem description
Winsock timeout errors may occur on slow, congested, or high latencyInternet links with Microsoft Proxy Server or ISA Server. The following Winsock errorMessage appears on the client Web browser:
   Proxy Reports:   10060 Connection timed out   The Web server specified in your URL could not be contacted. Please   check your URL or try your request again.					
Note A timeout error may also occur when connecting to an Internet serverthat does not exist or if there is more than one default gateway on theProxy Server computer.

For more information, click the following article number to view the article in the Microsoft Knowledge Base:
161380 Only one default gateway allowed on proxy server


To have us fix this problem for you, go to the "Fix it for me" section. To fix this problem yourself, go to the "Let me fix it myself" section.
Fix it for me
To fix this problem automatically, click the Fix itbutton or link. Click Runin the File Downloaddialog box, and then follow the steps in the Fix it wizard.




Note this wizard may be in English only; however, the automatic fix also works for other language versions of Windows.

Note If you are not on the computer that has the problem, you can save the automatic fix to a flash drive or to a CD, and then you can run it on the computer that has the problem.

Next, go to the "Did this fix the problem?" section.

Let me fix it myself
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 How to back up and restore the registry in Windows
Adjusting the following TCP/IP setting by adding a subkey in the registryshould reduce the number of timeouts by allowing more time for theconnection to complete. This setting is not present in the registry bydefault.
  1. Start Registry Editor (Regedt32.exe) and go tothe following subkey:
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
  2. On the Edit menu, click Add Value, and then add the following information:
          Value Name: TcpMaxDataRetransmissions      Value Type: REG_DWORD - Number      Valid Range: 0 - 0xFFFFFFFF      Default Value: 5 Decimal      New Value: 10 Decimal						
  3. Click OK, and then quit Registry Editor.
  4. Reboot after registry change has been made.


Did this fix the problem?
Check whether the problem is fixed. If the problem is fixed, you are finished with this article. If the problem is not fixed, you can contact support.
MORE INFORMATION
The TcpMaxDataRetransmissions parameter controls the number of times TCPretransmits an individual data segment (non connect segment) before endingthe connection. The retransmission timeout is doubled with each successiveretransmission on a connection. It is reset when responses resume. Thebasetimeout value is dynamically determined by the measured round-trip time onthe connection.

The Default Value for this registry entry is 5; double this value to 10(Decimal) (see step 2 above). If connection timeouts still occur, trydoubling the value again to 20 (Decimal).

Note This registry entry may only reduce the number of connection timeouterrors that occur. Changes to your Internet connection or router may haveto be made to completely resolve the problem.
fixit fix it
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Article ID: 191143 - Last Review: 09/11/2011 06:39:00 - Revision: 4.0

Microsoft Proxy Server 1.0 Standard Edition, Microsoft Internet Security and Acceleration Server 2000 Standard Edition, Microsoft Internet Security and Acceleration Server 2004 Enterprise Edition, Microsoft Internet Security and Acceleration Server 2004 Standard Edition, Microsoft Internet Security and Acceleration Server 2006 Enterprise Edition, Microsoft Internet Security and Acceleration Server 2006 Standard Edition

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