802.1d Spanning Tree

Disabled

If 802.1d Spanning Tree function is enabled, this router will use the spanning

tree protocol to prevent from network loop happened in the LAN ports.

DHCP Server

Enabled

You can enable or disable the DHCP server. By

enabling the DHCP

server the router will automatically give your LAN clients an IP address. If the

DHCP is not enabled then you’ll have to manually set your LAN client’s IP

addresses; make sure the LAN Client is in the same subnet as this

broadband router if you want the router to be your LAN client’s default

gateway

Lease Time

The DHCP when enabled will temporarily give your LAN clients an IP

address. In the Lease Time setting you can specify the time period that the

DHCP lends an IP address to your LAN clients. The DHCP will change your

LAN client’s IP address when this time threshold period is reached

IP Address Pool

You can select a particular IP address range for your DHCP server to issue IP

addresses to your LAN Clients.

Note:

By default the IP range is from: Start IP

192.168.2.100

to End IP

192.168.2.199

. If you want your PC to have a static/fixed IP address then

you’ll have to choose an IP address outside this IP address Pool

Domain Name

You can specify a Domain Name for your LAN

Click <

Apply>

at the bottom of the screen to save the above configurations. You can now configure other advance sections

or start using the router (with the advance settings in place)

2.4 NAT

Network Address Translation (NAT) allows multiple users at your local site to access the Internet through a single Public IP

Address or multiple Public IP Addresses. NAT provides Firewall protection from hacker attacks and has the flexibility to

allow you to map Private IP Addresses to Public IP Addresses for key services such as Websites and FTP.

Parameter

Description

Port Forwarding

You can have different services (e.g. email, FTP, Web etc.) going to different service

servers/clients in your LAN. The Port Forwarding allows you to re-direct a particular

range of service port numbers (from the Internet/WAN Ports) to a particular LAN IP

address.

Virtual Server

You can have different services (e.g. email, FTP, Web etc.) going to different service

servers/clients in your LAN. The Virtual Server allows you to re-direct a particular service

port number (from the Internet/WAN Port) to a particular LAN IP address and its service

port number.

Special Applications

Some applications require multiple connections, such as Internet games, video

conferencing, Internet telephony and others. In this section you can configure the router

to support these types of applications.

ALG Setting

You can select special applications that need “Application Layer Gateway” to support

here.

Click on one of the three NAT selections and proceed to the manual's relevant sub-section.

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2.4.1 Port Forwarding

The Port Forwarding allows you to re-direct a particular range of service port numbers (from the Internet/WAN Ports) to a

particular LAN IP address. It helps you to host some servers behind the router NAT firewall.

Parameter

Description

Enable Port Forwarding

Enable Port Forwarding

Private IP

This is the private IP of the server behind the NAT firewall.

Note:

You need to give your LAN PC clients a fixed/static IP address for Port Forwarding

to work properly.

Type

This is the protocol type to be forwarded. You can choose to forward “TCP” or “UDP”

packets only or select “both” to forward both “TCP” and “UDP” packets.

Port Range

The range of ports to be forward to the private IP.

Comment

The description of this setting.

Add Port Forwarding into

the table

Fill in the "Private IP", “Type”, “Port Range” and "Comment" of the setting to be added

and then click "Add". Then this Port Forwarding setting will be added into the "Current

Port Forwarding Table" below. If you find any typo before adding it and want to retype

again, just click "Clear" and the fields will be cleared.

Remove Port Forwarding

into the table

If you want to remove some Port Forwarding settings from the " Current Port Forwarding

Table", select the Port Forwarding settings you want to remove in the table and then click

"Delete Selected". If you want remove all Port Forwarding settings from the table, just

click "Delete All" button. Click "Reset" will clear your current selections.

Click <

Apply>

at the bottom of the screen to save the above configurations. You can now configure other advance sections

or start using the router (with the advance settings in place)

27

2.4.2 Virtual Server

Use the Virtual Server function when you want different servers/clients in your LAN to handle different service/Internet

application type (e.g. Email, FTP, Web server etc.) from the Internet. Computers use numbers called port numbers to

recognize a particular service/Internet application type. The Virtual Server allows you to re-direct a particular service port

number (from the Internet/WAN Port) to a particular LAN private IP address and its service port number. (See Glossary for

an explanation on Port number)

Parameter

Description

Enable Virtual Server

Enable Virtual Server.

Private IP

This is the LAN client/host IP address that the Public Port number packet will be sent to.

Note:

You need to give your LAN PC clients a fixed/static IP address for Virtual Server to

work properly.

Private Port

This is the port number (of the above Private IP host) that the below Public Port number

will be changed to when the packet enters your LAN (to the LAN Server/Client IP)

Type

Select the port number protocol type (TCP, UDP or both). If you are unsure, then leave it

to the default both protocol.

Public Port

Enter the service (service/Internet application) port number from the Internet that will be

re-directed to the above Private IP address host in your LAN

Note

: Virtual Server function will have priority over the DMZ function if there is a conflict

between the Virtual Server and the DMZ settings.

Comment

The description of this setting.

Add Virtual Server

Fill in the "Private IP", "Private Port", "Type", “Public Port” and "Comment" of the setting

to be added and then click "Add". Then this Virtual Server setting will be added into the

"Current Virtual Server Table" below. If you find any typo before adding it and want to

retype again, just click "Clear" and the fields will be cleared.

Remove Virtual Server

If you want to remove some Virtual Server settings from the " Current Virtual Server

Table", select the Virtual Server settings you want to remove in the table and then click

"Delete Selected". If you want remove all Virtual Server settings from the table, just click

"Delete All" button. Click "Reset" will clear your current selections.

Click <

Apply>

at the bottom of the screen to save the above configurations. You can now configure other advance sections

or start using the router (with the advance settings in place)

28

Example: Virtual Server

The diagram below demonstrates one of the ways you can use the Virtual Server function. Use the Virtual Server when you

want the web server located in your private LAN to be accessible to Internet users. The configuration below means that any

request coming form the Internet to access your web server will be translated to your LAN’s web server (192.168.2.2).

Note:

For the virtual server to work properly Internet/remote users must know your global IP address. (For websites you will need

to have a fixed/static global/public IP address)

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2.4.3 Special Applications

Some applications require multiple connections, such as Internet games, video conferencing, Internet telephony and others.

In this section you can configure the router to support multiple connections for these types of applications.

Parameter

Description

Enable Trigger Port

Enable the Special Application function.

Trigger Port

This is the out going (Outbound) range of port numbers for this particular application

Trigger Type

Select whether the outbound port protocol is “TCP”, “UDP” or both.

Public Port

Enter the In-coming (Inbound) port or port range for this type of application (e.g. 2300-

2400, 47624)

Note

: Individual port numbers are separated by a comma

(e.g. 47624, 5775, 6541 etc.). To input a port range use a “dash” to separate the two port

number range (e.g. 2300-2400)

Public Type

Select the Inbound port protocol type: “TCP”, “UDP” or both

Comment

The description of this setting.

Popular applications

This section lists the more popular applications that require multiple connections. Select

an application from the Popular Applications selection. Once you have selected an

application, click the

Add

button. This will automatically copy the Port Trigger information

required for this popular application in into the input fields.

Add Special Application

Fill in the "Trigger Port", "Trigger Type”, “Public Port”, "Public Type", "Public Port" and

"Comment" of the setting to be added and then click "Add". Then this Special Application

setting will be added into the "Current Trigger-Port Table" below. If you find any typo

before adding it and want to retype again, just click "Clear" and the fields will be cleared.

If you want to add a popular application, select one “Popular Application” and then click

“Add”.

Remove Special

Application

If you want to remove some Special Application settings from the " Current Trigger-Port

Table", select the Special Application settings you want to remove in the table and then

click "Delete Selected". If you want remove all Special Appliacation settings from the

table, just click "Delete All" button. Click "Reset" will clear your current selections.

Click <

Apply>

at the bottom of the screen to save the above configurations. You can now configure other advance sections

or start using the router (with the advance settings in place)

30