Friday, January 8, 2010

Pre-Authentication Check Failed

This is a really dumb sequence of error messages generated by the Citrix Access Gateway Secure Access Client.  If you happen to make a typo when entering the web address of the Access Gateway you will likely receive a security alert such as the following warning that the identity of the Citrix Access Gateway you are attempting to connect to cannot be verified.



This warning often appears even when there are no issues with the Access Gateway you are connecting to, rather there may be a proxy server on the network from which you are connecting or some other network device or access rule is blocking the verification -- so you might not think anything of it.  If you click "Yes" to continue, you'll likely receive a more serious warning indicating that your client has failed a pre-authentication check.




Before you start reconfiguring the access policies on your gateway or checking for new hot fixes or updates to apply, you may want to double-check the web address you entered for any typos.  The Citrix Access Gateway client does not actually verify that you entered a legitimate web address, it just goes ahead and tries to use it.  In this case, a simple typo in the web address meant that the host name could not be resolved resulting in the two warnings shown above.

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