This article was previously published under Q294305
When you browse to a Web site that is set to require client certificates, you may receive the following HTTP error message even if you are sure that the client certificate has not been revoked:
403.13 Client Certificate Revoked
By default, Internet Information Services (IIS) checks to see if the client certificate that is being presented has been revoked. It does this by downloading the client certificate's Certificate Revocation List (CRL) from a Certificate Distribution Point (CDP) that is listed as part of the client certificate. If IIS is unable to download at least one of the CRLs of the client certificate, the HTTP error message is displayed in the client's browser.
For each certificate in the chain that has a CDP listed, ensure that IIS is able to download at least one CRL. This usually involves adjusting firewall, proxy, or Domain Name Server (DNS) settings to admit the necessary traffic; depending on the protocol, this can be Hypertext Transfer Protocol (HTTP) or remote procedure call (RPC). Note that the Web server must be able to resolve the CRL even if the client browser can resolve the CRL because the Web server is servicing the HTTP request that requires the client certificate.
To avoid the HTTP 403.13 error message, do one of the following:
Enable IIS to download the CRL. To do this, follow these steps:
Delete any duplicate client certificates (that is, client certificates that are issued from the same Certificate Authority) from the client browser.
Start with the client certificate and proceed up the certification path. Paste each certificate's CDP HTTP reference in the browser on the server. If the file fails to download, there is a problem with the CDP.NOTE: Double-click each certificate in the certification path to view its properties.
Use the PING, Tracert.exe, or Wfetch.exe utilities to identify any name resolution or network latency issues that arise when you contact the problem CDP.
Find the IP address of the problem CDP and add an entry to the HOSTS file on the IIS computer. This should enable IIS to download the CRL and resolve the error.
Repeat these steps for each certificate in the client certificate's certification path.
If a proxy computer is involved, change the account that is used to start IIS to a domain administrator account and restart the IIS Admin service. If this resolves the issue, the local system account, or the account that is regularly used to start IIS, does not have sufficient permissions on the proxy server to access the Internet.
To view a certificate's CDP, follow these steps:
In Microsoft Internet Explorer, click Internet Options on the Tools menu.
On the Content tab, click Certificates.
On the Personal tab, double-click the client certificate.
Click the Certification Path tab of the client certificate to display each certificate in the path.
Double-click each of these certificates and click the Details tab. The CRL Distribution Point field contains entries that list the path to download the associated .crl file.NOTE: If a CDP is not listed, proceed to the next higher certificate in the path.
If a CDP extension is present in a certificate that is part of the certification path, IIS must be able to download at least one of the CRLs. If IIS is unable to resolve the CRL, it returns the HTTP 403.13 error.
Sample CRL Distribution Points:
CRL Distribution Point Distribution Point Name: Full Name: URL=http://server.domain.com/CertEnroll/server%20Root%20CA.crl<BR/><BR/>CRL Distribution Point Distribution Point Name: Full Name: URL=file://\\server2.domain.com\CertEnroll\server2%20Root%20CA.crl
For more information on Wfetch.exe, click the following article number to view the article in the Microsoft Knowledge Base:
284285 How to Use Wfetch.exe to Troubleshoot HTTP Connections
The CertCheckMode IIS metabase property enables or disables Certificate Revocation List (CRL) checking. When CertCheckMode is set to a value greater than 0, the CRL does not search for certificates that have been revoked. When CertCheckMode is equal to 0, the CRL searches for certificates that have been revoked. For more information, see the "CertCheckMode" topic in the IIS online help.