http://netdna.bootstrapcdn.com/bootstrap/3.1.0/css/bootstrap.min.css

https://unpkg.com/ngx-bootstrap/datepicker/bs-datepicker.css

https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.0/umd/popper.min.js

https://stackpath.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js

https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css

VPN Connectivity:
Please ensure you will have access EXIM & FBA URL through VPN if you are outside the organization network & connected over public network.