AirLive RS-2000 - Manual (Page 46)

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Host Table
The Bandwidth Manager’s Administrator may use the Host Table function to make the
Bandwidth Manager act as a DNS Server for the LAN. All DNS requests to a specific
Domain Name will be routed to the Bandwidth Manager’s IP address. The outside Internet
world may access the mail server of the organization easily by its domain name, providing that
the Administrator has set up Virtual Server or Mapped IP settings correctly. However, for the
users in the LAN network, their WAN DNS server will assign them a public IP address for the
mail server. So for the LAN network to access the mail server (mail.MH2000.com), they
would have to go out to the Internet, then come back through the Bandwidth Manager to
access the mail server. Essentially, the LAN network is accessing the mail server by a real
public IP address, while the mail server serves their request by a NAT address and not a real
one.
This odd situation occurs when there are servers in the DMZ network and they are binded to
real IP addresses. To avoid this, set up Host Table so all the LAN network computers will
use the Bandwidth Manager as a DNS server, which acts as the Host Table.
If you want to use the Host Table function of the device, the end user’s main DNS
server IP address should be the same IP Address as the device.