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Page 86 / 99 Scroll up to view Page 81 - 85
Broadband Router User Guide
82
Other Routers on the Local LAN
Other routers on the local LAN must use the TW100-BRF114U's
Local Router
as the
Default
Route
. The entries will be the same as the TW100-BRF114U's local router, with the exception
of the
Gateway IP Address
.
•
For a router with a direct connection to the TW100-BRF114U's local Router, the
Gateway
IP Address
is the address of the TW100-BRF114U's local router.
•
For routers which must forward packets to another router before reaching the TW100-
BRF114U's local router, the
Gateway IP Address
is the address of the intermediate router.
Static Routing - Example
Figure 52: Routing Example
For the TW100-BRF114U's Routing Table
For the LAN shown above, with 2 routers and 3 LAN segments, the TW100-BRF114U re-
quires 2 entries as follows.
Entry 1 (Segment 1)
Destination IP Address
192.168.1.0
Network Mask
255.255.255.0
(Standard Class C)
Gateway IP Address
192.168.0.100
(Broadband Router's local
Router)
Metric
2
Entry 2 (Segment 2)
Destination IP Address
192.168.2.0
Network Mask
255.255.255.0
(Standard Class C)
Gateway IP Address
192.168.0.100
Metric
3
For Router A's Default Route
Destination IP Address
0.0.0.0
Network Mask
0.0.0.0
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Page 87 / 99
Advanced Administration
83
Gateway IP Address
192.168.0.1
(Broadband Router's IP Address)
For Router B's Default Route
Destination IP Address
0.0.0.0
Network Mask
0.0.0.0
Gateway IP Address
192.168.1.80 (Broadband Router's local
router)
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Page 88 / 99
Broadband Router User Guide
84
Security
This screen allows you to set Firewall and other security-related options.
Figure 53: Security Screen
Data - Security Screen
Firewall
Enable DoS
Firewall
If enabled, DoS (Denial of Service) attacks will be detected and
blocked. The default is enabled. It is strongly recommended that this
setting be left enabled.
Note:
•
A DoS attack does not attempt to steal data or damage your PCs,
but overloads your Internet connection so you can not use it - the
service is unavailable.
•
This device uses "Stateful Inspection" technology. This system can
detect situations where individual TCP/IP packets are valid, but
collectively they become a DoS attack.
Threshold
This setting affects the number of "half-open" connections allowed.
•
A "half-open" connection arises when a remote client contacts the
Server with a connection request, but then does not reply to the
Server's response.
•
While the optimum number of "half-open" connections allowed
(the "Threshold") depends on many factors, the most important
factor is the available bandwidth of your Internet connection.
•
Select the setting to match the bandwidth of your Internet connec-
tion.
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Page 89 / 99
Advanced Administration
85
Options
Respond to
ICMP
The ICMP protocol is used by the "ping" and "traceroute" programs,
and by network monitoring and diagnostic programs.
•
If checked, the TW100-BRF114U will repond to ICMP packets
received from the Internet.
•
If not checked, ICMP packets from the Internet will be ignored.
Disabling this option provides a slight increase in security.
Allow IPsec
The IPSec protocol is used to establish a secure connection, and is
widely used by VPN (Virtual Private Networking) programs.
•
If checked, IPSec connections are allowed.
•
If not checked, IPSec connections are blocked.
Allow PPTP
PPTP (Point to Point Tunneling Protocol) is widely used by VPN
(Virtual Private Networking) programs.
•
If checked, PPTP connections are allowed.
•
If not checked, PPTP connections are blocked.
Allow L2TP
L2TP is a protocol developed by Cisco for VPNs (Virtual Private
Networks).
•
If checked, L2TP connections are allowed.
•
If not checked, L2TP connections are blocked.
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Page 90 / 99
Broadband Router User Guide
86
Upgrade Firmware
The firmware (software) in the TW100-BRF114U can be upgraded using your Web Browser.
You must first download the upgrade file, then select
Upgrade
on the
Administration
menu.
You will see a screen like the following.
Figure 54: Upgrade Firmware Screen
To perform the Firmware Upgrade:
1.
Click the "Browse" button and navigate to the location of the upgrade file.
2.
Select the upgrade file. Its name will appear in the
Upgrade File
field.
3.
Click the "Start Upgrade" button to commence the firmware upgrade.
The Broadband Router is unavailable during the
upgrade process, and must restart when the up-
grade is completed. Any connections to or through
the Broadband Router will be lost.
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