Article ID: 244223 - View products that this article applies to.
This article has been archived. It is offered "as is" and will no longer be updated.
When you restart a Microsoft Small Business Server-based computer that is running Proxy Server, the following event may be logged in Event Viewer:
This article describes how to troubleshoot and resolve this error message.
Event ID 127
Web Proxy Service Failed to Initialize.
The common causes of this error message and the appropriate resolutions are listed below.
Incorrect Web proxy cache pathsThe Web proxy cache paths may be incorrect. Confirm and correct the registry paths if necessary, so that the CachePath values in the following registry location match the actual path to the Urlcache folder:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\W3Pcache \Parameters\Paths\PathxFor each Pathx you can find CachePath values. For example, if the Urlcache folder is located in C:\Urlcache, the CachePath value for Pathx is C:\Urlcache\Dirx.
The Web proxy DLL filter is not loadedIf the Web proxy DLL filter is not loaded, it is either not present or a red arrow that points down is displayed next to it. To confirm the configuration or to correct issues with the Web proxy filter, use the following steps:
Incorrect permissions on the W3proxy.dll fileThe permissions on the W3proxy.dll file may be incorrect.
The W3proxy.dll file is located in the %SystemRoot%\Inetpub\Scripts \Proxy folder, or wherever the Inetpub directory is located (usually in the root of the drive where IIS was installed)..
The NTFS File System (NTFS) Permissions should be:
Administrators Full Control Everyone Full Control Server Operators Change System Full Control W3proxy.dll Execute
Incorrect permissions on the Urlcache folderThe permissions on the Urlcache folder may be incorrect. Ensure that the NTFS file system permissions include the following permissions:
Administrators Full Control Creator/Owner Full Control Domain Admins Full Control Domain Users Read Server Operators Change System Full Control
Incorrect local address table (LAT) entriesBy default, the LAT include the Private IP ranges:
The LAT should include entries from the NT Internal Routing Table. For example, if the Network Interface Card (NIC) connected to the Local Area Network (LAN) has an Internet Protocol (IP) of 10.0.0.1 with a subnet mask of 255.255.255.0, the LAT should have the following entries added:
FromTo 10.0.0.0 - 10.255.255.255 172.16.0.0 - 172.31.255.255 192.168.0.0 - 192.168.255.255
To confirm or add the NT Internal Routing Table to the LAT use the following steps:
FromTo 10.0.0.0 - 10.0.0.255
Windows Internet naming service (WINS) may be bound to the external interfaceIf WINS is bound to the external interface, use the following steps to unbind WINS:
Windows NT 4.0
WINS server entries for the external interfaceThe external interface may have entries for the WINS server. To remove the WINS server addresses for the external interface:
Internet Explorer is not bypassing proxy for local addressesIf you are seeing the "Source Text For Default Internet Web Site" when trying to access external Internet web sites, in addition to getting the above error, then Internet Explorer may not be configured to bypass Proxy for local addresses. This setting should be configured on the server itself.
For more information, click the following article numbers to view the articles in the Microsoft Knowledge Base:
(https://support.microsoft.com/kb/220978/ )"Web Proxy service failed to start. Please check the server Event log for further details" error message
(https://support.microsoft.com/kb/242285/ )Access violation in Inetinfo.exe with WebProxyCache event ID 113