Microsoft KB Archive/154028

= 100% CPU Usage When FTP Clients Connect to IIS =

Article ID: 154028

Article Last Modified on 6/23/2005

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APPLIES TO


 * Microsoft Internet Information Server 1.0

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This article was previously published under Q154028



We strongly recommend that all users upgrade to Microsoft Internet Information Services (IIS) version 6.0 running on Microsoft Windows Server 2003. IIS 6.0 significantly increases Web infrastructure security. For more information about IIS security-related topics, visit the following Microsoft Web site:

http://www.microsoft.com/technet/security/prodtech/IIS.mspx





SYMPTOMS
FTP clients may be sluggish or appear to hang and the CPU usage may rise to 100% and remain at 100% until the FTP service is stopped and restarted. Macintosh FTP clients (for example, Mac Fetch) may also appear to hang.



CAUSE
This problem appears when a Macintosh Volume is applied to a directory that is also used by the IIS FTP service.



WORKAROUND
Move the Macintosh volume to another directory that is not used by FTP. If non-FTP Macintosh clients still need to access the data in the original directory, directory replication can be used to synchronize the files with another directory that is used by the FTP service.



STATUS
Microsoft has confirmed this to be a problem in Microsoft Internet Information Server version 1.0c. This problem was corrected in Microsoft Internet Information Server 2.0.

Additional query words: slow stop ftp

Keywords: kbenv KB154028

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