31

of

72

SIP

Allows devices and applications using VoIP (Voice over IP) to communicate across NAT.

Some VoIP applications and devices have the ability to discover NAT devices and work

around them. This ALG may interfere with the operation of such devices. If you are

having trouble making VoIP calls, try turning this ALG off.

Wake-On-LAN

This feature enables forwarding of "magic packets" (that is, specially formatted wake-up

packets) from the WAN to a LAN computer or other device that is "Wake on LAN" (WOL)

capable. The WOL device must be defined as such on the

Advanced

→

Virtual Server

page. The LAN IP address for the virtual server is typically set to the broadcast address

192.168.0.255. The computer on the LAN whose MAC address is contained in the magic

packet will be awakened.

MMS

Allows Windows Media Player, using MMS protocol, to receive streaming media from the

internet.

INBOUND FILTER

When you use the Virtual Server, Gaming, or Remote Administration features to open specific

ports to traffic from the Internet, you could be increasing the exposure of your LAN to

cyberattacks from the Internet. In these cases, you can use Inbound Filters to limit that exposure

by specifying the IP addresses of internet hosts that you trust to access your LAN through the

ports that you have opened. You might, for example, only allow access to a game server on your

home LAN from the computers of friends whom you have invited to play the games on that

server.

Inbound Filters can be used for limiting access to a server on your network to a system or group

of systems. Filter rules can be used with Virtual Server, Gaming, or Remote Administration

features. Each filter can be used for several functions; for example a "Game Clan" filter might

allow all of the members of a particular gaming group to play several different games for which

gaming entries have been created. At the same time an "Admin" filter might only allows systems

from your office network to access the WAN admin pages and an FTP server you use at home. If

you add an IP address to a filter, the change is effected in all of the places where the filter is

used.

Add/Edit Inbound Filter Rule

Here you can add entries to the Inbound Filter Rules List below, or edit existing entries.

Name

Enter a name for the rule that is meaningful to you.

Action

The rule can either Allow or Deny messages.

32

of

72

Remote IP Range

Define the ranges of Internet addresses this rule applies to. For a single IP address, enter

the same address in both the

Start

and

End

boxes. Up to eight ranges can be entered.

The

Enable

checkbox allows you to turn on or off specific entries in the list of ranges.

Save/Update

Record the changes you have made into the following list.

Clear

Re-initialize this area of the screen, discarding any changes you have made.

Inbound Filter Rules List

The section lists the current Inbound Filter Rules. An entry can be changed by clicking

the Edit icon or can be deleted by clicking the Delete icon. When you click the Edit icon,

the item is highlighted, and the "Edit Inbound Filter Rule" section is activated for editing.

In addition to the filters listed here, two predefined filters are available wherever inbound

filters can be applied:

Allow All

Permit any WAN user to access the related capability.

Deny All

Prevent all WAN users from accessing the related capability. (LAN users are not affected

by Inbound Filter Rules.)

ADVANCED WIRELESS

Transmit Power

Normally the wireless transmitter operates at 100% power. In some circumstances,

however, there might be a need to isolate specific frequencies to a smaller area. By

reducing the power of the radio, you can prevent transmissions from reaching beyond

your corporate/home office or designated wireless area.

Beacon Period

Beacons are packets sent by a wireless router to synchronize wireless devices. Specify a

Beacon Period value between 20 and 1000. The default value is set to 100 milliseconds.

RTS Threshold

When an excessive number of wireless packet collisions are occurring, wireless

performance can be improved by using the RTS/CTS (Request to Send/Clear to Send)

handshake protocol. The wireless transmitter will begin to send RTS frames (and wait for

CTS) when data frame size in bytes is greater than the RTS Threshold. This setting

should remain at its default value of 2346 bytes.

33

of

72

Fragmentation Threshold

Wireless frames can be divided into smaller units (fragments) to improve performance in

the presence of RF interference and at the limits of RF coverage. Fragmentation will

occur when frame size in bytes is greater than the Fragmentation Threshold. This setting

should remain at its default value of 2346 bytes. Setting the Fragmentation value too low

may result in poor performance.

DTIM Interval

A DTIM is a countdown informing clients of the next window for listening to broadcast and

multicast messages. When the wireless router has buffered broadcast or multicast

messages for associated clients, it sends the next DTIM with a DTIM Interval value.

Wireless clients detect the beacons and awaken to receive the broadcast and multicast

messages. The default value is 1. Valid settings are between 1 and 255.

802.11d Enable

Enables 802.11d operation. 802.11d is a wireless specification for operation in additional

regulatory domains. This supplement to the 802.11 specifications defines the physical

layer requirements (channelization, hopping patterns, new values for current MIB

attributes, and other requirements to extend the operation of 802.11 WLANs to new

regulatory domains (countries). The current 802.11 standard defines operation in only a

few regulatory domains (countries). This supplement adds the requirements and

definitions necessary to allow 802.11 WLAN equipment to operate in markets not served

by the current standard. Enable this option if you are operating in one of these "additional

regulatory domains".

Wireless Isolation

Enabling Wireless Isolation prevents associated wireless clients from communicating with

each other.

WMM Enable

Enabling WMM can help control latency and jitter when transmitting multimedia content

over a wireless connection.

WDS Enable

When WDS is enabled, this access point functions as a wireless repeater and is able to

wirelessly communicate with other APs via WDS links. Note that WDS is incompatible

with WPA -- both features cannot be used at the same time. A WDS link is bidirectional;

so this AP must know the MAC Address (creates the WDS link) of the other AP, and the

other AP must have a WDS link back to this AP. Make sure the APs are configured with

same channel number.

WDS AP MAC Address

Specifies one-half of the WDS link. The other AP must also have the MAC address of this

AP to create the WDS link back to this AP. Enter a MAC address for each of the other

APs that you want to connect with WDS.

34

of

72

WISH

WISH is short for Wireless Intelligent Stream Handling, a technology developed to enhance your

experience of using a wireless network by prioritizing the traffic of different applications.

WISH

Enable WISH

Enable this option if you want to allow WISH to prioritize your traffic.

Priority Classifiers

HTTP

Allows the router to recognize HTTP transfers for many common audio and video

streams and prioritize them above other traffic. Such streams are frequently used by

digital media players.

Windows Media Center

Enables the router to recognize certain audio and video streams generated by a

Windows Media Center PC and to prioritize these above other traffic. Such streams are

used by systems known as Windows Media Extenders, such as the Xbox 360.

Automatic

When enabled, this option causes the router to automatically attempt to prioritize traffic

streams that it doesn't otherwise recognize, based on the behaviour that the streams

exhibit. This acts to deprioritize streams that exhibit bulk transfer characteristics, such as

file transfers, while leaving interactive traffic, such as gaming or VoIP, running at a

normal priority.

Add/Edit WISH Rule

A WISH Rule identifies a specific message flow and assigns a priority to that flow. For

most applications, the priority classifiers ensure the right priorities and specific WISH

Rules are not required.

WISH supports overlaps between rules. If more than one rule matches for a specific

message flow, the rule with the highest priority will be used.

Enable

Specifies whether the entry will be active or inactive.

Name

Create a name for the rule that is meaningful to you.

35

of

72

Priority

The priority of the message flow is entered here. Four priorities are defined:

•

BK: Background (least urgent).

•

BE: Best Effort.

•

VI: Video.

•

VO: Voice (most urgent).

Protocol

The protocol used by the messages.

Host 1 IP Range

The rule applies to a flow of messages for which one computer's IP address falls within

the range set here.

Host 1 Port Range

The rule applies to a flow of messages for which host 1's port number is within the range

set here.

Host 2 IP Range

The rule applies to a flow of messages for which the other computer's IP address falls

within the range set here.

Host 2 Port Range

The rule applies to a flow of messages for which host 2's port number is within the range

set here.

Save/Update

Record the changes you have made into the following list.

Clear

Re-initialize this area of the screen, discarding any changes you have made.

WISH Rules

This section lists the defined WISH Rules. Click the Enable checkbox at the left to directly

activate or de-activate the entry. An entry can be changed by clicking the Edit icon or can

be deleted by clicking the Delete icon. When you click the Edit icon, the item is

highlighted, and the "Edit WISH Rule" section is activated for editing.