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4.4 Advanced Settings
Dynamic DNS
The Dynamic DNS feature allows you to host a server (Web, FTP, Game Server,
etc.) using a domain name that you have purchased with your dynamically
assigned IP address. Most broadband Internet Service Providers assign dynamic
(changing) IP addresses. When you use a Dynamic DNS service provider, your
friends can enter your host name to connect to your server, no matter what your
IP address is.
°
Enable Dynamic DNS
: Place a check in this box to enable the DDNS feature.
°
Service Address
: Select a DDNS service provider from the drop-down list.
DynDNS is a free service while TZO offers a 30 day free trial.
°
Host Name
: Specify the website URL.
°
User Name
: Specify the user name for the DDNS service.
°
Password
: Specify the password for the DDNS service and verify it once
again in the next field.
°
Timeout
: Specify the time between periodic updates to the Dynamic DNS, if
the dynamic IP address has not changed. The timeout period is entered in
hours.
Click on the
Apply
button once you have modified the settings.
Page 52 / 74
StreamEngine
The StreamEngine feature helps improve the network performance by prioritizing
applications.
°
Enable Traffic Shaping
: Place a check in the box to enable traffic shaping.
When this option is enabled, the router restricts the flow of outbound traffic
so as not to exceed the WAN uplink bandwidth.
°
Automatic Uplink Speed
. Place a check in this box to enable automatic
uplink speed. When enabled, this option causes the router to automatically
measure the useful uplink bandwidth each time the WAN interface is re-
established (after a reboot, for example).
°
Measured Uplink Speed
: Displays the uplink speed. This is the uplink speed
measured when the WAN interface was last re-established. The value may be
lower than that reported by your ISP as it does not include all of the network
protocol overheads associated with your ISP's network. Typically, this figure
will be between 87% and 91% of the stated uplink speed for xDSL
connections and around 5 kbps lower for cable network connections.
°
Manual Uplink Speed
: Specify an uplink speed or select it from the drop-
down list. If Automatic Uplink Speed is disabled, this option allows you to set
the uplink speed manually. Uplink speed is the speed at which data can be
transferred from the router to your ISP.
Page 53 / 74
°
Connection Type
: By default, the router automatically determines whether
the underlying connection is an xDSL/Frame-relay network or some other
connection type (such as cable modem or Ethernet), and it displays the result
as Detected xDSL or Frame Relay Network. If you have an unusual network
connection in which you are actually connected via xDSL but for which you
configure either Static or DHCP in the WAN settings, setting this option to
xDSL or Other Frame Relay Network ensures that the router will recognize
that it needs to shape traffic slightly differently in order to give the best
performance. Choosing xDSL or Other Frame Relay Network causes the
measured uplink speed to be reported slightly lower than before on such
connections, but gives much better results.
Click on the
Apply
button to store these settings.
Routing
This section adds a new entry into the routing table.
°
Enable
: Place a check in this box to enable the routing table entry.
°
Name
: Specify a name for the rule.
°
Destination IP
: Specify the destination IP address.
°
Netmask
: Specify the subnet mask for the IP address.
°
Gateway
: Specify the IP address of the gateway.
°
Metric
: Specify the number of routing hops. The route metric is a value from
1 to 16 that indicates the cost of using this route. A value of 1 is the lowest
cost, and 15 is the highest cost. A value of 16 indicates that the route is not
reachable from this router. When trying to reach a particular destination,
computers on your network will select the best route, ignoring unreachable
routes.
°
Interface
: Select the interface from the drop-down list.
Click on the
Save
button to insert the entry into the Routing table.
Page 54 / 74
MAC Address Filter
This feature is used to restrict certain MAC address from accessing the Internet.
These filters can be used for securing and restricting your network.
°
Configure MAC Filtering
: Select one of the options from the drop-down list.
o
Turn MAC Filtering OFF:
When "OFF" is selected, MAC addresses are
not used to control network access.
o
Turn MAC Filtering ON and ALLOW computers listed to access
the network:
When "ALLOW" is selected, only computers with MAC
addresses listed in the MAC Filtering Rules list are granted network
access.
o
Turn MAC Filtering ON and DENY computers listed to access the
network:
When "DENY" is selected, any computer with a MAC address
listed in the MAC Filtering Rules list is refused access to the network.
°
MAC Address
: Specify that MAC address that you would like to filter.
Click on the
Apply
button to store the changes.
Page 55 / 74
Firewall Settings
The device provides a tight firewall by virtue of the way NAT works. Unless you
configure the router to the contrary, the NAT does not respond to unsolicited
incoming requests on any port, thereby making your LAN invisible to Internet
cyber attacks. However, some network applications cannot run with a tight
firewall. Those applications need to selectively open ports in the firewall to
function correctly. The options on this page control several ways of opening the
firewall to address the needs of specific types of applications.
°
Enable SPI
: Place a check in this box to enable SPI. SPI ("stateful packet
inspection" also known as "dynamic packet filtering") helps to prevent cyber
attacks by tracking more state per session. It validates that the traffic passing
through that session conforms to the protocol. When the protocol is TCP, SPI
checks that packet sequence numbers are within the valid range for the
session, discarding those packets that do not have valid sequence numbers.
Whether SPI is enabled or not, the router always tracks TCP connection states
and ensures that each TCP packet's flags are valid for the current state.
°
TCP / UDP NAT Endpoint Filtering
options control how the router's NAT
manages incoming connection requests to ports that are already being used.
Select one of the radio buttons.
o
End Point Independent
Once a LAN-side application has created a
connection through a specific port, the NAT will forward any incoming
connection requests with the same port to the LAN-side application
regardless of their origin. This is the least restrictive option, giving the
best connectivity and allowing some applications (P2P applications in
particular) to behave almost as if they are directly connected to the
Internet.
o
Address Restricted
The NAT forwards incoming connection requests
to a LAN-side host only when they come from the same IP address
with which a connection was established. This allows the remote
application to send data back through a port different from the one
used when the outgoing session was created.

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