On the USG series firewall, after the web redirection function is configured, the authentication page cannot be displayed. Which of the following is not the cause of the fault?

On the USG series firewall, after the web redirection function is configured, the authentication page cannot be displayed. Which of the following is not the cause of the fault?
A . The authentication policy is not configured or the authentication policy is incorrectly configured.
B . Web authentication is not enabled.
C . The browser SSL version does not match the SSL version of the firewall authentication page.
D . The port of service of authentication page is set to 8887

Answer: D