DMZ Server Backup

Hi guys
i need your help
i have a server localized in a DMZ (perimeter Network) and i need make backups with acronis Backup and Recovery 11
My Administrative Acronis Console is hosted in a WindowsServer and we have a firewall that manage the network.
My backups are storage in a NAS Server in my local network.
I need to know what we have to do to connect from my Administrative Console to my Acronis Agent installed in my DMZ Server and set my DMZ´s Backup Plan.
I need configure my firewall? Active Directory policy?
I installed Acronis agent in other servers in my local network an storage the Automatic Backup Data in my NAS Server and everything work fine.
Thanks for your help,
Regards