The Windows workstation you use to install Novell® ZENworks® 7 Server Management components to servers throughout your network must have access to a DNS name server. In addition, the servers where you install Server Management components must have valid entries in DNS.
DNS is not required for Management and Monitoring Services.
If you have a NAT (Network Address Translation) environment, a recipient might or might not be able to reply (depending on the routes available back to the sender), because Internet routers drop packets having destinations of 10.x.x.x, 172.16.x.x, or 192.168.x.x.