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Captive portal feature is authentication portal before client access to the internet. It check authorization of user to access the internet. You can authentication on captive portal with AD user but first, you must connect fortigate firewall with AD.

Captive portal feature is authentication portal before client access to the internet. It check authorization of user to access the internet. You can authentication on captive portal with AD user but first, you must connect fortigate firewall with AD.

You can use port forwarding for any service port such as RDP, FTP, SSH, HTTP, HTTPS. Port forwarding improve easy to access any service on private network from any where but port forward have not authentication for check authorization so it is low security. In some case such as HTTP, HTTPS (public website only) port forwarding are accept because HTTP,HTTPS is public service user around the world should be access from any where. In this case I will show port forwarding  for RDP. Step As Video   

Redirect website feature can bundle with captive portal feature. You can specific website that user must redirect after authen on captive portal such as Intranet website, search engine website , webmail and company website. Redirect website feature can help comfortable more for user to access frequency website automatically Step as Video

When client want bypass authentication for access to the internet but you cannot get MAC address of each client Another solution you can bypass by using client's IP address because you get client's IP address on DCHP server Step as Video

When you enable feature captive portal that force client must authenticate before access to the internet but you want to exempt some client such as VIP, Admin, Board, President. You can exempt captive portal for them by add MAC address device to captive portal configuration Step as Video

When client need to access the internet. First step you enable captive portal feature.Client must be authentication on captive portal and check authorization for  access into the internet You can use feature of captive portal for control user such as Upload/Download bandwidth. Bypass device from captive portal(use MAC address). Create voucher. Redirect URL after authentication. Do not login duplicate.  You can use captive portal on hotspot solution or control internet usage on your organization. Step as Video