Eurotech 930150-4003R, Руководство пользователя

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PART 2: SOFTWARE CONFIGURATION
51 110150-4002A
The ZyWAN-G9 is able to act as a gateway, but in order to route traffic from one interface to another,
there must also be a NAT entry configured on the
Networking page to route from the source network to
the destination network.
DNS Server
As a DHCP Server, the ZyWAN-G9 also acts as a DNS server
, responding to client devices‟ requests
to resolve named addresses (URL or FQDN) into numeric addresses. The ZyWAN-G9 acts as a DNS
proxy, so that any DNS requests from the client device are passed to one of the DNS servers known to
the ZyWAN-G9, and the resulting IP address is returned to the client device.
In order to resolve DNS addresses, the ZyWAN-G9 needs to know the location of one or more DNS
server(s). It obtains the list of these servers in the same way as it obtains its default route, either
statically configured or obtained dynamically. On whichever interface is currently the default route
(eth0, eth1, eth2, ppp0, ppp1, etc.), the DNS servers may be obtained from that network or statically
defined in the Web configuration. This list of address(es) is used by the DNS proxy.
The
Open Ports section on the Networking page must include UDP port 53, to allow the ZyWAN-G9 to
receive DNS requests.