Microsoft KB Archive/241562

= IIS May Permit Clients with an Unresolved IP Address to Connect =

Article ID: 241562

Article Last Modified on 9/2/2005

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APPLIES TO


 * Microsoft Internet Information Server 4.0

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This article was previously published under Q241562



SYMPTOMS
When using IIS IP and Domain Restrictions to deny clients by a specific domain name, a client with an IP address that IIS cannot resolve will still be allowed to connect. The client may request content over this connection for the duration of the session. If the client makes a request over a different connection, it will be properly denied, and will receive a 403 error that the IP address is not allowed.



RESOLUTION
A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

NOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

The English version of this fix should have the following file attributes or later:

  Date      Time                 Size    File name     Platform -  09/16/99  12:40PM              322KB   asp.dll       x86 09/16/99 12:38PM              043KB   coadmin.dll   x86 09/16/99 12:39PM              011KB   ftpctrs2.dll  x86 09/16/99 12:39PM              080KB   ftpsvc2.dll   x86 09/16/99 11:49PM              012KB   httpext.h     x86 09/16/99 12:38PM              018KB   iisadmin.dll  x86 09/16/99 12:38PM              062KB   iislog.dll    x86 09/16/99 12:38PM              017KB   infoadmn.dll  x86 09/16/99 12:38PM              181KB   infocomm.dll  x86 09/16/99 12:38PM              029KB   iscomlog.dll  x86 09/16/99 12:39PM              011KB   iwrps.dll     x86 09/16/99 12:37PM              070KB   metadata.dll  x86 09/16/99 12:38PM              051KB   nsepm.dll     x86 09/16/99 12:39PM              015KB   w3ctrs.dll    x86 09/16/99 12:39PM              224KB   w3svc.dll     x86 09/16/99 12:38PM              086KB   wam.dll       x86

09/16/99 03:40PM              537KB   asp.dll       alpha 09/16/99 03:38PM              076KB   coadmin.dll   alpha 09/16/99 03:39PM              017KB   ftpctrs2.dll  alpha 09/16/99 03:40PM              124KB   ftpsvc2.dll   alpha 09/16/99 03:40PM              028KB   iisadmin.dll  alpha 09/16/99 03:40PM              110KB   iislog.dll    alpha 09/16/99 03:40PM              026KB   infoadmn.dll  alpha 09/16/99 03:40PM              181KB   infocomm.dll  alpha 09/16/99 03:40PM              297KB   iscomlog.dll  alpha 09/16/99 03:40PM              017KB   iwrps.dll     alpha 09/16/99 03:40PM              129KB   metadata.dll  alpha 09/16/99 03:40PM              051KB   nsepm.dll     alpha 09/16/99 03:40PM              021KB   w3ctrs.dll    alpha 09/16/99 03:40PM              377KB   w3svc.dll     alpha 09/16/99 03:40PM              146KB   wam.dll       alpha This hotfix has been posted to the following Internet location as Iprftp4i.exe (x86) and Iprftp4a.exe (Alpha):

ftp://ftp.microsoft.com/bussys/iis/iis-public/fixes/usa/iis40/hotfixes-postsp6/security/iprftp-fix/



STATUS
Microsoft has confirmed that this is a problem in Internet Information Server 4.0.



MORE INFORMATION
For related information on this problem, please visit the following Microsoft Web site:

http://www.microsoft.com/security/bulletins/

For additional security-related information about Microsoft products, please visit the following Microsoft Web site:

http://www.microsoft.com/security/

Keywords: kbbug kbfix KB241562

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