Linksys E2000 [27/59] Security firewall
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Linksys E2000 [27/59] Security firewall

Linksys E2000 [27/59] Security firewall
27
Advanced Wireless-N Router
Linksys E2000 Chapter 3: Advanced Configuration
CTS Protection Mode The Router automatically
uses CTS (Clear-To-Send) Protection Mode when your
Wireless-N and 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-N and Wireless-G
transmissions but severely decreases performance. To use
this option, keep the default, Auto. To disable this option,
select Disabled.
Beacon Interval A beacon is a packet broadcast by the
Router to synchronize the wireless network. The Beacon
Interval value indicates the frequency interval of the
beacon. Enter a value between 20 and 65,535 milliseconds.
The default value is 100.
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 This value specifies the
maximum size for a packet before data is fragmented
into multiple packets. If you experience a high packet
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 Request to Send (RTS) threshold size, the RTS/CTS
(Clear to Send) mechanism will not be enabled. The Router
sends 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 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
Filter Anonymous Internet Requests This option makes
it more difficult for outside users to work their way into
your network. This option is enabled by default. Disable it
to allow anonymous Internet requests
.
Filter Multicast The multicasting feature allows for
multiple transmissions to specific recipients at the
same time. If multicasting is permitted, then the Router
will allow IP multicast packets to be forwarded to the
appropriate computers. Select this option to enable the
filter. This option is disabled by default.
Filter Internet NAT Redirection This option is used to
prevent a local computer from using a URL or Internet
address to access the local server. Select this option to
enable the filter. This option is disabled by default.
Filter IDENT (Port 113) The Filter IDENT (Identification)
option keeps port 113 from being scanned by devices
outside of your local network. This option is enabled by
default. Disable it to allow port113 to be scanned.
Web Filter
Proxy Use of WAN proxy servers may compromise the
Gateway’s security. Denying Proxy will disable access to
any WAN proxy servers. Select this option to enable proxy
filtering. Deselect the option to allow proxy access
.

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