DescriptionThis article describes how to configure Guest captive portal on FortiAuthenticator with external CA certificate.Solution1) configure guest user group with the Fortinet group attribute in Authentication -> User Groups and then edit the user group.
2) Configure the RADIUS client with the shared secret in Authentication -> RADIUS Service -> Clients and then edit the RADIUS client.
Select the group filter with the guest user group.
3) Guest portal configuration is available under Authentication -> Guest Portals -> Portals.
Configure the Guest Portal name and select the RADIUS client in profile configuration.
The URL of the Guest Portal, in the format of:
https://<FortiAuthenticator IP/FQDN>/guests
4) Go to Certificate Management -> Certificate Authorities -> Trusted CA and import the CA certificate generated from the third party CA Authorities.
5) Import the SSL certificate in Certificate Management -> End Entities -> Local Services.
6) Select the Trusted CA certificate in Administration -> System access then select the imported server certificate in 'Https certificate'.