I have a DNS server set up for my company. We work directly with another company with a direct connection to them through a router that does NAT we sit on a 192.168.0.x and they have their own range of IP addresses. Right now all we do is modify the host files on each computer with the names and IP addresses we need for resources on their network, but it's very annoying when there is a change and we have to get IP information from someone there to update the hosts file. I want to know what I need to do to set up my DNS server to sync up with theirs. Do I need them to grant some kind of permissions to our server to grab that information?