Troubleshooting Tip: Joining as a domain user to resolve white page on a portal when white page is not due to certificate, web filter or app control issue on a FortiGate

[Oscar_Wee]

Description	This article explains why joining as a domain user can often resolve white page issues on a portal when the white page is not due to a certificate, web filter, or app control issue on a FortiGate.
Scope	FortiGate.
Solution	Check that the certificate of the website has not expired and is trusted by the browser. Check that the website is not blocked by a web filter or app control.  White page issues can be fixed by signing up as a domain user: Centralized Verification: A centralized Active Directory domain, which offers a single point of authentication for numerous apps and resources, is used to manage domain users. Portal Compatibility: A lot of applications and portals are made to function with domain authentication, depending on it to manage user access. The white page is encountered when the user joins in as a local user and not a domain user. Solved by joining in as a domain user: