Technical Tip: Editing a disclaimer page to open another web page after selecting the 'Yes, I agree' button

Pre-requisite:

The disclaimer page is configured on a FortiGate firewall policy:

Technical Tip: Configuring a disclaimer page on a FortiGate firewall policy

When the user is presented with a disclaimer page and selects the 'Yes, I agree' button, the administrator wants to present a new web page to the user. (Example: the organization's internal website).

This can be done by editing the source code of the disclaimer page.  

From GUI, Go to System -> Replacement Messages -> Extended View -> Authentication -> Disclaimer Page, 'double-click' or select 'Edit', and add the below code to the function sb(val): 

 if(val == '1'){
window.open("https://www.example.com");
}

Replace www.example.com to the desired website by the administrator. See the below screenshot:

Clear existing sessions before testing this change.