User's Manual

Table Of Contents
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can be entered manually, according to the information provided by the ISP.
To configure the connection to automatically obtain a DNS server address, select Obtain DNS Server Address
Automatically from the “DNS Server” drop-down list. To manually configure DNS server addresses, select Use
the Following DNS Server Addresses from the “DNS Server” drop-down list. Up to two different DNS server
addresses can be entered (Primary and Secondary).
Routing
Select Advanced or Basic from the “Routing” drop-down list. If Advanced is selected, additional options
appear, as listed below.
Routing Mode Select one of the following three Routing modes:
Route - This option causes the TG590 Router to act as a router between two networks.
NAT - This option activates Network Address Translation (NAT), which translates IP addresses to a valid,
public address on the Internet. NAT adds security, since the IP addresses of the devices on the
network are not transmitted publicly. In addition, NAT allows many addresses to exist behind a
single valid address. Use the NAT routing mode only if the local network consists of a single device,
or collisions may occur if more than one device attempts to communicate using the same port.
NAPT -This option activates NAPT (Network Address and Port Translation),
which refers to network address translation involving the mapping of port
numbers and allows multiple machines to share a single IP address. Use NAPT
if the local network contains multiple devices, a topology that necessitates
port translation in addition to address translation.
Device Metric The device metric is a value used by the TG590 Router to
determine whether one route is superior to another, considering parameters
such as bandwidth, delay, and more.
Default Route Click in this check box to make the connection the default route.
Multicast - IGMP Proxy Default Click in this check box to enable the TG590 to issue IGMP (Internet Group
Management Protocol) host messages on behalf of hosts the TG590 Router discovers through standard IGMP
interfaces.
IGMP proxy enables the routing of multicast packets according to the IGMP requests of local network devices
asking to join multicast groups.