One of the very nice features in Leaptest and what really makes it a test automation platform is the ease of defining and using remote machines to execute your test cases.
Part of this is to use cloud-hosted providers like Sauce Labs and BrowserStack to handle all the environments where you execute your test cases.
This way you don’t have to host and maintain all the permutations of version, operating systems and browsers in your own infrastructure.

Browsers started through Sauce Lab and BrowserStack can access both publicly available web sites and web sites running behind a firewall.
Leaptest now has support for running BrowserStack locally which works by routing all requests from the browser running at BrowserStack
through the local computer. This means all requests from the BrowserStack browser will be handled as if it was running in
a browser on the local computer thereby giving it access to internal test sites, local DNS’s etc.