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.
• RTS Threshold This value should remain at its default setting of 2347. The range is 0-2347 bytes.
Should you
encounter inconsistent data flow, only minor modifications are 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.
• Fragmentation Threshold This value should remain at its default setting of 2346. The range is
256-2346
bytes. It 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
modifications of this
value are recommended.
Figure 6-19: Advanced Wireless Settings
The Security Tab
Firewall
When you click the Security tab, you will see the Firewall screen (see Figure 6-20). This screen
contains Filters
and Block WAN Requests. Filters block specific internal users from accessing the Internet and
block anonymous
Internet requests and/or multicasting.
• Firewall. To add Firewall Protection, click
Enabled
. If you do not want Firewall Protection, click
Disabled
.
• Filter Proxy. Use of WAN proxy servers may compromise the Router's security. Denying Filter
Proxy will
disable access to any WAN proxy servers. To enable proxy filtering, click
Enabled
.
• Filter Cookies. A cookie is data stored on your PC and used by Internet sites when you interact
with them. To
enable cookie filtering, click
Enabled
.
• Filter Java Applets. Java is a programming language for websites. If you deny Java Applets, you
run the risk
of not having access to Internet sites created using this programming language. To enable Java
Applet
filtering, click
Enabled
.
• Filter ActiveX. ActiveX is a programming language for websites. If you deny ActiveX, you run the
risk of not
having access to Internet sites created using this programming language. To enable ActiveX
filtering, click
Enabled
.
• Filter Multicast. Multicasting allows for multiple transmissions to specific recipients at the same
