USING BAHMNI EXTERNAL NETWORK/ Url doesn't translate correctly

Bahmin is working ok in a local network acessing the sabe Web server from the outside network via router it works ok but the ‘Apointtements schedulling’ is pointing to internal adress https://internal_adresse/browser/appintments and doesn’t work, Url doent translate correcttly. If we put the https://external_adresse/browser/appintments manually in the browser URL it works ok.