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Internet Solutions
     
 

403.16

Client certificate is untrusted or invalid

 
  Description  
     
 

Some web sites require you have a special "certificate" to access the site. This typically occurs with higher security sites, such as a corporate web site for employee access only. It appears you have the certificate, but it not usable.

 
 
   
  Example  
     
 
Windows
Server Error

403.16 - Forbidden: Client certificate is ill-formed or is not trusted by the Web server.

Your client certificate is untrusted or invalid. A Secure Sockets Layer (SSL) client certificate is used for identifying you as a valid user of the resource.

 
 
Error messages will differ depending on the web server and if replaced by the web site designers.
 
   
  Occurrences  
     
 
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Frequency is relative to other Internet warnings and errors.
 
   
  Solutions and Fixes  
     
 
Get New Certificate
9
    Add    Flag
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You will need to contact the web owners to get a new certificate (what is called a client SSL certificate).
 
   
 
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  FaultWire Staff
Posted: 26-Oct-2008
 
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  Official Explanation  
     
 
  technical detailsThe client browser tries to use a client certificate that is not trusted by the server that is running IIS 7.0 or that is not valid.

(From Microsoft - The HTTP status codes in IIS 7.0)
Additional notes for the web server administrator - Microsoft Knowledgebase article 942061.
 
   
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  Notes  
     
  "403.16 - Client certificate is untrusted or invalid" is only supported by Microsoft IIS (Internet Information Services) web servers.

The four hundred series of errors indicate something was sent to the remote web server incorrectly.
 
     
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