TD-VG3631

300Mbps Wireless N VoIP ADSL2+ Modem Router User Guide

37

Figure 4-17

¾

Virtual Private Network (VPN) -

VPN Passthrough must be enabled if you want to allow

VPN tunnels using VPN protocols to pass through the Modem Router.

•

PPTP

Passthrough

-

Point-to-Point

Tunneling

Protocol

(PPTP)

allows

the

Point-to-Point Protocol (PPP) to be tunneled through an IP network. To allow PPTP

tunnels to pass through the Modem Router, click

Enable

.

•

L2TP Passthrough

- Layer Two Tunneling Protocol (L2TP) is the method used to

enable Point-to-Point sessions via the Internet on the Layer Two level. To allow L2TP

tunnels to pass through the Modem Router, click

Enable

.

•

IPSec Passthrough

- Internet Protocol security (IPSec) is a suite of protocols for

ensuring private, secure communications over Internet Protocol (IP) networks, through

the use of cryptographic security services. To allow IPSec tunnels to pass through the

Modem Router, click

Enable

.

¾

Application Layer Gateway (ALG) -

It is recommended to enable Application Layer

Gateway (ALG) because ALG allows customized Network Address Translation (NAT)

traversal filters to be plugged into the gateway to support address and port translation for

certain application layer "control/data" protocols such as FTP, TFTP etc.

•

FTP ALG

- To allow FTP clients and servers to transfer data across NAT, click

Enable

.

•

TFTP ALG

- To allow TFTP clients and servers to transfer data across NAT, click

Enable

.

Click the

Save

button to save your settings.

4.4.7 DSL Settings

Choose “

Advanced Setup

”

Æ

“

DSL Settings

”, you can select the DSL Modulation Type and

Annex Type in the next screen. The DSL feature can be selected when you meet the physical

connection problem. Please check the proper settings with your Internet service provider.

TD-VG3631

300Mbps Wireless N VoIP ADSL2+ Modem Router User Guide

38

Figure 4-18

¾

DSL Modulation Type:

Select the DSL operation Modulation Type which your DSL

connection uses.

¾

Annex Type:

Select the DSL operation Annex Type which your DSL connection uses.

Click the

Save

button to save your settings.

4.5 DHCP Server

Choose “

DHCP Server

”, you can see the next submenus:

Click any of them, and you will be able to configure the corresponding function.

4.5.1 DHCP Settings

Choose menu “

DHCP Server

”

Æ

“

DHCP Settings

”, you can configure the DHCP Server on the

page as shown in Figure 4-19.The Modem Router is set up by default as a DHCP (Dynamic Host

Configuration Protocol) server, which provides the TCP/IP configuration for all the PC(s) that are

connected to the Modem Router on the LAN.

TD-VG3631

300Mbps Wireless N VoIP ADSL2+ Modem Router User Guide

39

Figure 4-19

¾

Start IP Address:

Enter a value for the DHCP server to start with when issuing IP addresses.

Because the default IP address for the Modem Router is 192.168.1.1, the default Start IP

Address is

192.168.1.100

, and the Start IP Address must be 192.168.1.100 or greater, but

smaller than 192.168.1.254.

¾

End IP Address:

Enter a value for the DHCP server to end with when issuing IP addresses.

The End IP Address must be smaller than 192.168.1.254. The default End IP Address is

192.168.1.254

.

¾

Address Lease Time:

The Leased Time is the amount of time in which a network user will be

allowed connection to the Modem Router with their current dynamic IP address. Enter the

amount of time, in hours, then the user will be “leased” this dynamic IP address. After the

dynamic IP address has expired, the user will be automatically assigned a new dynamic IP

address. The default is

24

hours.

¾

Default Gateway - (Optional):

It is suggested to input the IP address of the LAN port of the

Modem Router. The default value is 192.168.1.1.

¾

Default Domain -

(Optional):

Input the domain name of your network.

¾

Primary DNS - (Optional):

Input the DNS IP address provided by your ISP or consult your

ISP.

¾

Secondary DNS - (Optional):

Input the IP address of another DNS server if your ISP

provides two DNS servers.

¾

DHCP Relay:

Select

Relay

, then you will see the next screen, and the Modem Router will

work as a DHCP Relay. A DHCP relay is a computer that forwards DHCP data between

computers that request IP addresses and the DHCP server that assigns the addresses. Each

of the device's interfaces can be configured as a DHCP relay. If it is enabled, the DHCP

requests from local PCs will forward to the DHCP server runs on WAN side. To have this

function working properly, please run on router mode only, disable the DHCP server on the

LAN port, and make sure the routing table has the correct routing entry.

TD-VG3631

300Mbps Wireless N VoIP ADSL2+ Modem Router User Guide

40

)

Note:

1)

To use the DHCP server function of the Modem Router, you must configure all computers on

the LAN as "Obtain an IP Address automatically".

2)

You have to disable NAT of the WAN connections, or the DHCP Relay may not take effect.

3)

If you select

Disabled

, the DHCP function will not take effect.

Click the

Save

button to save your settings.

4.5.2 Clients List

Choose menu “

DHCP Server

”

Æ

“

Clients List

”, you can view the information about the clients

attached to the Modem Router in the screen as shown in Figure 4-20.

Figure 4-20

¾

Client Name

:

The name of the DHCP client

¾

MAC Address

:

The MAC address of the DHCP client

¾

IP Address

:

The IP address that the Modem Router has allocated to the DHCP client

¾

Valid Time

:

The time of the DHCP client leased. After the dynamic IP address has expired,

a new dynamic IP address will be automatically assigned to the user.

You cannot change any of the values on this page. To update this page and to show the current

attached devices, click the

Refresh

button.

4.5.3 Address Reservation

Choose menu “

DHCP Server

”

Æ

“

Address Reservation

”, you can view and add a reserved

address for clients via the next screen (shown in Figure 4-21).When you specify a reserved IP

address for a PC on the LAN, that PC will always receive the same IP address each time when it

accesses the DHCP server. Reserved IP addresses should be assigned to the servers that require

permanent IP settings.

TD-VG3631

300Mbps Wireless N VoIP ADSL2+ Modem Router User Guide

41

Figure 4-21

¾

MAC Address:

The MAC address of the PC for which you want to reserve an IP address.

¾

IP Address:

The IP address reserved for the PC by the Modem Router.

¾

Status:

The status of this entry either

Enabled

or

Disabled

.

To Reserve an IP address:

1.

Click the

Add New

button. Then Figure 4-22 will pop up.

2.

Enter the MAC address (in XX:XX:XX:XX:XX:XX format.) and IP address (in dotted-decimal

notation) of the computer for which you want to reserve an IP address.

3.

Click the

Save

button.

Figure 4-22

To modify or delete an existing entry:

1.

Click the

Edit

in the entry you want to modify. If you want to delete the entry, click the

Delete

.

2.

Modify the information.

3.

Click the

Save

button.

Click the

Enable/Disable Selected

button to make selected entries enabled/disabled.

Click the

Delete Selected

button to selected entries.

4.5.4 Conditional Pool

Choose menu “

DHCP Server

”

Æ

“

Conditional Pool

”, you can see the next screen (shown in

Figure 4-23). This page displays vendor class settings and allows you to set parameters for

vendor class by clicking corresponding buttons.