VT2542 Voice Gateway User Guide

23

Overview

Installation

Troubleshooting

Contact

FAQ

Glossary

License

Configuration:

Basic

Advanced

TCP/IP

Wireless

IP QoS Traffic Rule

This window displays when you click

Add

on the

IP QoS

window. Use it to define rules for filtering packets.

IP QoS Traffic Rule fields

Field

Description

Rule Name

The rule name

Source IP

Sets the source IP address for the rule

Source Start Port

Sets the source start port

Destination IP

Sets the destination IP address

Destination Start Port

Sets the destination start port

Packet Length Start

Sets the minimum packet size for the rule

Protocol

Sets the protocol — TCP, UDP, ICMP, or Any

Traffic Priority

Sets the priority for traffic matching these characteristics — High or Low

Source Netmask

Sets the source subnet mask, which along with the Source IP specifies a range of source

IP addresses

Source End Port

Sets the source end port

Destination Netmask

Sets the destination subnet mask, which along with the Destination IP specifies a range of

destination IP addresses

Destination End Port

Sets the destination end port

Packet Length End

Sets the maximum packet size allowed by the rule

Physical Port

Can be none, Port 1, Port 2, Port 3, Port 4, or WLAN

VT2542 Voice Gateway User Guide

24

Overview

Installation

Troubleshooting

Contact

FAQ

Glossary

License

Configuration:

Basic

Advanced

TCP/IP

Wireless

Normal Service

Packets matching the rule are treated as normal packets requiring no special treatment along

the path. Normal packets have TOS byte 0 in the IP Header.

TOS Marking

Enables you to assign a TOS value to this traffic — No Change, Normal Service, Minimize

monetary cost, Maximize reliability, Maximize throughput, or Minimize delay. The priority bits

in the TOS byte are set to zero upon marking and derived based on priority queues. The

priority bit value for each priority queue is:

•

Voice (EF1): 5

•

High (EF2): 4

•

Medium: 3

•

Low: 1

IP QoS Traffic Rule fields (continued)

Field

Description

VT2542 Voice Gateway User Guide

25

Overview

Installation

Troubleshooting

Contact

FAQ

Glossary

License

Configuration:

Basic

Advanced

TCP/IP

Wireless

Port Forwarding

Port forwarding enables you to direct incoming traffic to specific LAN hosts (computers on your network) based on

the protocol and port number. It is used to play Internet games or provide local services (such as web hosting) for

a LAN group. Port forwarding is also referred to as “virtual servers.” You can:

•

Apply predefined port forwarding rules to one or more computers

•

If you have the necessary networking knowledge, create, edit, or delete your own port forwarding rules

•

Add a computer to the

DMZ

Port Forwarding fields and buttons

Field or Button

Description

Allow Incoming Ping

Enables the voice gateway to respond to a ping from the Internet.

LAN IP

Selects the IP address to host the service.

New IP

Displays the LAN Clients window to reserve an IP address.

DMZ

Displays the

IP Filters

page.

Custom Port Forwarding

Displays the

DMZ Settings

page.

Category

Sets the category for which rules are displayed in the Available Rules list — Games, VPN,

Audio/Video, Apps (applications), Servers, or User (custom rules you can define and edit).

Available Rules

Lists the available rules in the selected Category.

VT2542 Voice Gateway User Guide

26

Overview

Installation

Troubleshooting

Contact

FAQ

Glossary

License

Configuration:

Basic

Advanced

TCP/IP

Wireless

View

Displays the protocols and port ranges for the selected Available Rule. For example, if you

select Alien vs. Predator and click

View

, the following is displayed:

Click

Cancel

to return to the Port Forwarding page.

Add

Adds the selected Available Rule to the Applied Rules list.

Remove

Deletes the selected rule from the Applied Rules list.

Applied Rules

Lists the IP filtering rules you selected to apply for each given category.

Port Forwarding fields and buttons (continued)

Field or Button

Description

VT2542 Voice Gateway User Guide

27

Overview

Installation

Troubleshooting

Contact

FAQ

Glossary

License

Configuration:

Basic

Advanced

TCP/IP

Wireless

DMZ Settings

Configuring a computer as a demilitarized zone (DMZ) forwards any network traffic that is not redirected to

another computer through port forwarding to the IP address of the computer. This allows access to the DMZ host

from the Internet.

DMZ Settings fields

Field

Description

Enable DMZ

Enables or disables the DMZ feature. It is disabled by default.

Select a LAN IP Address

Selects the LAN IP address of the DMZ computer to expose to the Internet with no

protection from the VT2542 firewall.

This may expose your network to security risks.

LAN Clients

Displays the

LAN Clients

page to configure the DMZ computer.

.