Setup of Public Captive Portal

1. Portal basic Settings

Configure Certificate and enable HTTPS

config user setting
    set auth-cert "certificate"
    set auth-secure-http enable  
end

Set public FQDN / DNS Name

config firewall auth-portal
    set portal-addr "portal.company.com"
end

2. Configure public Port

It is recommended to explicitly set a public Port

config system global
    set auth-https-port 45443
end

3. Update Policies

Simply add your Users/Groups to the Policies.