Security > Firewall - Linksys WRT54GH User Manual

Chapter 3
authentication, the sender and the recipient do NOT
use a WEP key for authentication. With Shared Key
authentication, the sender and recipient use a WEP key for
authentication. Select Shared Key to only use Shared Key
authentication.
Basic Rate The Basic Rate setting is not actually one
rate of transmission but a series of rates at which the
Router can transmit. (The Basic Rate is not the actual rate
of data transmission. If you want to specify the Router's
rate of data transmission, configure the Transmission
Rate setting.) The Router will advertise its Basic Rate to
the other wireless devices in your network, so they know
which rates will be used. The Router will also advertise that
it will automatically select the best rate for transmission.
The default setting is Default, when the Router can
transmit at all standard wireless rates (1-2 Mbps, 5.5 Mbps,
11 Mbps, 18 Mbps, and 24Mbps). Select 1-2 Mbps for
use with older wireless technology. Select All, when the
Router can transmit at all wireless rates.
Transmission Rate The Transmission setting is available
if the Network Mode is Mixed, Wireless-G Only, or
Wireless-B Only. The rate of data transmission should be
set depending on the speed of your wireless network.
Select from a range of transmission speeds, or keep the
default, Auto, to have the Router automatically use the
fastest possible data rate and enable the Auto-Fallback
feature. Auto-Fallback will negotiate the best possible
connection speed between the Router and a wireless
client.
CTS Protection Mode
The Router automatically uses CTS
(Clear-To-Send) Protection Mode when your Wireless-G
devices are experiencing severe problems and are not able
to transmit to the Router in an environment with heavy
802.11b traffic. This option boosts the Router's ability to
catch all Wireless-G transmissions but severely decreases
performance. To use this option, keep the default, Auto.
To disable this option, select Disabled.
Beacon Interval Enter a value between 1 and 65,535
milliseconds. The Beacon Interval value indicates the
frequency interval of the beacon. A beacon is a packet
broadcast by the Router to synchronize the wireless
network. The default is 100 milliseconds.
DTIM Interval This value, between 1 and 255, indicates
the interval of the Delivery Traffic Indication Message
(DTIM). A DTIM field is a countdown field informing
clients of the next window for listening to broadcast
and multicast messages. When the Router has buffered
broadcast or multicast messages for associated clients, it
sends the next DTIM with a DTIM Interval value. Its clients
hear the beacons and awaken to receive the broadcast
and multicast messages. The default value is 1.
Fragmentation Threshold
maximum size for a packet before data is fragmented
into multiple packets. If you experience a high packet
Wireless-G Home Router with SpeedBurst
This value specifies the
Advanced Configuration
error rate, you may slightly increase the Fragmentation
Threshold. Setting the Fragmentation Threshold too low
may result in poor network performance. Only minor
reduction of the default value is recommended. In most
cases, it should remain at its default value of 2346.
RTS Threshold Should you encounter inconsistent data
flow, only minor reduction of the default value, 2347, is
recommended. If a network packet is smaller than the
preset RTS threshold size, the RTS/CTS mechanism will
not be enabled. The Router sends Request to Send (RTS)
frames to a particular receiving station and negotiates
the sending of a data frame. After receiving an RTS, the
wireless station responds with a Clear to Send (CTS) frame
to acknowledge the right to begin transmission. The RTS
Threshold value should remain at its default value of
2347.
Click Save Settings to apply your changes, or click Cancel
Changes to clear your changes.
Security > Firewall
The Firewall screen is used to configure a firewall that can
filter out various types of unwanted traffic on the Router's
local network.
Security > Firewall
Firewall
SPI Firewall Protection To use firewall protection,
keep the default selection, Enabled. To turn off firewall
protection, select Disabled.
Internet Filter
For the following options, select the option to enable it, or
deselect the option to disable it.
Filter Anonymous Internet Requests
it more difficult for outside users to work their way into
your network. This feature is enabled by default. Deselect
this option to allow anonymous Internet requests.
This feature makes
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