Microsoft KB Archive/316864

= Problems with Adobe Acrobat 5.0 After You Install URLScan =

Article ID: 316864

Article Last Modified on 10/2/2003

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APPLIES TO


 * Microsoft Internet Information Server 4.0

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This article was previously published under Q316864



SYMPTOMS
You may receive the following error messages in Microsoft Internet Explorer after you install URLScan:

File does not begin with '%PDF-'.

-or-

The file is damaged and cannot be repaired



CAUSE
In the Urlscan.ini file, RemoveServerHeader is set to 1.



RESOLUTION
The update for this problem is included in the &quot;MS02-018: April 2002 Cumulative Patch for Internet Information Services&quot;. For additional information about how to obtain this patch, click the article number below to view the article in the Microsoft Knowledge Base:

319733 MS02-018: April 2002 Cumulative Patch for Internet Information Services



WORKAROUND
To work around this problem, set RemoveServerHeader to 0.



STATUS
Microsoft has confirmed that this problem may cause a degree of security vulnerability in Microsoft Internet Information Server 4.0.



MORE INFORMATION
Permitted values for RemoveServerHeader are 0 and 1. If the value is 1, URLScan removes the server header on all responses. If the value is 0, URLScan does not remove the server header on all responses. The default value for RemoveServerHeader is 0. Note that this feature is only available if URLScan is installed on IIS 4.0 or later.