Nat - ATCOM AT-640 User Manual

AT-640 User Manual
� DNS: default DNS server of lease table.
� Press "add" to apply, will added DHCP lease table.
� Lease Table Name: Select name of lease table, click the Delete
delete the selected lease table from DHCP lease table.
� DNS Relay: Select DNS Relay, the default is enable. Click the Apply button to
become effective.
DHCP Lease Table: Shows the DHCP Lease Table ， the unit of Lease time is
�
Minute.
Notice: Notice: Notice: Notice:
1） The size of lease table cannot be larger than the quantity of C network IP address.
We recommend you to use the default lease table and not modify it.
2） If you modifies the DHCP lease table, you need save the configuration and reboot.
4.2. 4.2.
4.2. 4.2.

NAT

NAT NAT NAT
NAT is abbreviated from Net Address Translation; it's a protocol responsible for IP
address translation. In other word, it is responsible for transforming IP and port of
private network to public, also is the IP address mapping which we usually say.
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.
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Delete Delete button will Delete