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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
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VT2542 Voice Gateway User Guide
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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
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VT2542 Voice Gateway User Guide
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Overview
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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.
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VT2542 Voice Gateway User Guide
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Overview
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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
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VT2542 Voice Gateway User Guide
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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.
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