Configuring Client Certificate Authentication
Users logging on to a Citrix Gateway virtual server can also be authenticated based on the client certificate attributes presented to the virtual server. Client certificate authentication can also be used with other authentication types, such as LDAP or RADIUS, to provide two-factor authentication.
To authenticate users based on the client-side certificate attributes, client authentication must be enabled on the virtual server and the client certificate must be requested. You must bind a root certificate to the virtual server on Citrix Gateway.
When users log on to the Citrix Gateway virtual server, after authentication, the user name information is extracted from the specified field of the certificate. Typically, this field is Subject:CN. If the user name is extracted successfully, the user is then authenticated. The authentication fails in the following cases.
- If the user does not provide a valid certificate during the Secure Sockets Layer (SSL) handshake.
- The user name extraction fails, authentication fails.
You can authenticate users based on the client certificate by setting the default authentication type to use the client certificate. You can also create a certificate action that defines what is to be done during the authentication based on a client SSL certificate.
- Go toConfiguration > Citrix Gateway,and then clickGlobal Settings.
- In the details pane, underAuthentication Settings, clickChange authentication CERT settings.
- SelectONto enable two factor authentication using the certificate as per your requirement.
- InUser Name Field, select the type of certificate field that holds the user names.
- InGroup Name Field, select the type of the certificate field that holds the group name.
- InDefault Authorization Group, type the name of the default group, and then clickOK.
If client certificate authentication is enabled on Citrix Gateway, users are authenticated based on certain attributes of the client certificate. After authentication is successful, the user name or the user and group name of the user are extracted from the certificate. Also, the policies specified for that user are applied.
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