Troubleshooting Tip: HTTP header length is too long

[btey]

Description	This article describes how to troubleshoot and resolve an 'HTTP header length is too long' error.
Scope	FortiAuthenticator 6.6.7 and 8.0.0.
Solution	The following error may be encountered while accessing the FortiAuthenticator portal: Check the HTTP request header length. To resolve, increase the 'Maximum HTTP header length' if needed (System -> Administrator -> System Access -> GUI Access -> Maximum HTTP header length). Default Maximum HTTP header length is 4KB.  Related article:  For more information on adjusting system access settings, see System access - FortiAuthenticator 8.0.0.