Hello! Can I test prefect cloud free trial behind company network?

Hey @Rafal, The only communication you'll need for Cloud is: Calling out to Prefect Cloud when registering a flow. Your agent should be able to query the Prefect API for scheduled work. Otherwise, all other communication should happen inside your company network.

For sure, but what about e.g images which are inside company servers and available only behind VPN? Will I be able to register this kind of flow ?

As long as your agent, which is installed on your infrastructure, is able to access the images you need then you should be able to execute that work with that dependency.