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Patch Management - Knowledge base

Patch Download Failure - "Error 403" or "Unknown Host Exception"


You are trying to download patches of Microsoft/other vendors. However Patch download fails with error message: "Error Code 403 or Unknown Host Exception".


Error code 403 occurs when the web server is not reachable or access to the server has been denied. This might happen due to various reasons such as, forbidden access, or connectivity issues.


  Trying to Update Windows 10?

  To update patches related to Windows 10, using Desktop Central you will have to follow the steps mentioned here:
   Steps to update patches in Windows 10 

  1. Ensure that the configured Proxy settings has permission to download the installabe files from the below mentioned websites
    1. http://download.microsoft.com - for Microsoft applications
    2. http://download.cdn.mozilla.net/ - for Mozila Firefox & Mozilla Thunderbird
    3. http://*.adobe.com - for Adobe patches, flash player, Adobe air
    4. http://fpdownload.macromedia.com - for Adobe Shockwave Player
    5. http://javadl.sun.com - for Java updates
    6. http://*.apple.com/ - for Mac OS updates, Quick time player, Itunes  & JRE 1.6
    7. http://cache-download.real.com - for Real player
    8. http://*.oracle.com/ - for JRE 1.7
    9. http://*.sourceforge.net/ - for Open Office
    10. http://dl.google.com - for Google chrome s
    11. http://ftp.jaist.ac.jp - for Mozilla Firefox 3.6
    12. http://www.piriform.com - for CCleaner
    13. http://www.tightvnc.com - for TightVNC
    14. http://*.videolan.org/ - for TightVNC
    15. http://*.tuxfamily.org - for Notepad ++
    16. http://www.rarlab.com - for WinRAR
    17. http://cdn01.foxitsoftware.com - for Foxit Reader
    18. http://ftp.iitm.ac.in - for Libre Office
    19. https://*.cdburnerxp.se- for CDBurnerXP
    20. http://download.winzip.com - for Winzip
    21. http://*.download.pdfforge.org - PDF Architect
    22. http://allwaysync.com - for AllwaySync
    23. http://ftp.gimp.org - for GIMP

  2. Retry the process of downloading the patch from the vendors website.
  3. In case if this problem continues, kindly Contact Support

Applies to: Patch Deployment, Patch Configuration, Patch Download

Keywords: Patch Management, Deploy Patches, Configure Patch Installation, Download Patches

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