What kind of protection against attack is covered by the license? (if any)
Cloud Imperium
The natural resources embedded upon or within your property and the objects and structures you place upon it are considered an extension of yourself. Thus, anyone attempting to steal from or attack those assets is committing a criminal act, which UEE security will deal with as they would any other transgression of a similar magnitude.
starfarer.space · Q&A: UEE Land Claim Licenses Part 2