Denwa Communications DW-610G User Manual page 87

DMZ config：
In order to make some intranet equipments support better service for extranet, and
make internal network security more effectively, these equipments open to extranet
need be separated from the other equipments not open to extranet by the
corresponding isolation method according to different demands. We can provide the
different security level protection in terms of the different resources by building a
DMZ region which can provide the network level protection for the equipments
environment, reduce the risk which is caused by providing service to distrust
customer, and is the best position to put public information
The following chart describes the network access control of DMZ.