Purpose of domain proxy / endpoints?

Could you help me understand this? What is the purpose of domain proxy?
Is it for asterisk to hide behind another IP so endpoint users dont know asterisk real IP address?


Asterisk does not come with a GUI, so I have no idea where the form came from.

There are many reasons for having a proxy, although they are normally associated with more complex installations.

Its from xlite (softphone)
sorry i wasnt more descriptive