Appliance Error: "Authentication agent rejected request (Context Lost)"

Products

• ProxySG Software - SGOS

Issue/Introduction

• You are seeing exception page Appliance Error (internal_error) when IWA Authentication is configured
• When running a policy trace, you see the following exception when trying to authenticate

                  EXCEPTION(internal_error): An unrecoverable internal error

                  Last Error: The IWA direct realm encountered an unmapped error code, contact your system administrator.

• You may also see the same error when using the “Test Configuration” option on the proxy under Configuration > IWA > IWA Servers

Cause

The "context lost" portion of the exception is an indication of the domain no longer being able to identify what the authentication request refers to. 
 

Resolution

Rejoining the proxy to the Windows Domain resolved the issue.

Note: There are some other circumstances where the internal_error exception may appear. Please review the additional related articles below for further information: 

Content Encoding Error (content_encoding_error)

Error: 'Clock skew detected with active directory server'