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Windows 8.1 w/Update 1 ignores WPAD DHCP Option 252

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Hi!

We try to roll out Windows 8.1 w/Update 1 and Internet Explorer 11 with the lastest updates installed. The clients are configured to autodetect proxy settings in IE with WPAD DHCP-Option 252. The clients are not allowed to query WPAD in DNS.

No problems with Windows 7.

In NetMon I can see the DHCP Request with the following result

  - WPAD: http://wpad.server.name/wpad.dat - Type 252
     OpCode: Web Proxy Auto Detection (WPAD), 252(0xFC)
     Length: 30 (0x1E)
     URL: http://wpad.server.name/wpad.dat
  + End:

But the Windows 8.1 client still tries to use name resolution

NbtNs:Query Request for WPAD   <0x00> Workstation Service

The same issues with WindowsToGo with Windows 8.1 w/Update 1.

Any ideas? We tried a lot with Troubleshooting Automatic Detection on http://technet.microsoft.com/en-us/library/cc302643.aspx but nothing helps. Thanks!

 


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