TD-W8980

N600 Wireless Dual Band Gigabit ADSL2+ Modem Router User Guide

32

Click

Save

to make the entry effective immediately

4.5.3 LAN Settings

Choose “

Network

”

Æ

“

LAN Settings

” menu, and you will see the LAN screen (shown in Figure

4-13). Please configure the parameters for LAN ports according to the descriptions below.

Figure 4-13

¾

IP Address:

You can configure the modem router’s IP Address and Subnet Mask for LAN

Interface.

•

IP Address:

Enter the modem router’s local IP Address, then you can access to the

Web-based Utility via the IP Address, the default value is 192.168.1.1.

•

Subnet Mask:

Enter the modem router’s Subnet Mask, the default value is 255.255.255.0.

¾

Enable IGMP Snooping:

If you select the option, please choose the IGMP Mode

:

Standard

Mode or Blocking Mode.

¾

Enable Second IP:

You can configure the modem router’s second IP Address and Subnet

Mask for LAN Interface through which you can also access to the Web-based Utility as the

default IP Address and Subnet Mask.

¾

DHCP Server:

These settings allow you to configure the modem router‘s Dynamic Host

Configuration Protocol (DHCP) server function. The DHCP server is enabled by default for the

modem router’s Ethernet LAN interface. DHCP service will supply IP settings to computers

which are configured to automatically obtain IP settings that are connected to the modem

router though the Ethernet port. When the modem router is set for DHCP, it becomes the

default gateway for DHCP client connected to it. Keep in mind that if you change the IP

address of the modem router, you must change the range of IP addresses in the pool used for

DHCP on the LAN.

•

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.

TD-W8980

N600 Wireless Dual Band Gigabit ADSL2+ Modem Router User Guide

33

•

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

.

•

Leased 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

1440

minutes.

The detailed configuration about DHCP server, please refer to section

4.6 DHCP Server

.

4.5.4 IPv6 LAN Settings

Choose menu “

Network

”

Æ

“

IPv6 LAN Settings

”, you can configure LAN IPv6 interface for your

modem router.

Figure 4-14

¾

Address Autoconfiguration Type:

Select a type to assign IPv6 addresses to the computers

in your LAN. RADVD and DHCPv6 Server are provided.

1)

If RADVD is selected, it doesn’t need to be configured.

2)

If DHCPv6 Server is selected, please complete the following parameters.

Figure 4-15

•

Start IPv6 Address:

Enter a value for the DHCPv6 server to start with when issuing IPv6

addresses.

•

End IPv6 Address:

Enter a value for the DHCPv6 server to end with when issuing IPv6

addresses.

•

Leased 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 IPv6 address. Enter

TD-W8980

N600 Wireless Dual Band Gigabit ADSL2+ Modem Router User Guide

34

the amount of time, in hours, then the user will be “leased” this dynamic IPv6 address.

After the dynamic IPv6 address has expired, the user will be automatically assigned a

new dynamic IPv6 address. The default is 86400 seconds.

¾

Site Prefix Configuration Type:

Select a type to assign prefix to IPv6 addresses. Delegated

and Static are provided.

1)

If Delegated is selected, please complete the following parameters.

Figure 4-16

•

Prefix Delegated WAN Connection:

Select a WAN connection form the drop-down list

to assign prefix.

2)

If Static is selected, please complete the following parameters.

Figure 4-17

•

Site Prefix:

Enter a value for the site prefix.

•

Site Prefix Length:

Enter a value for the site prefix length.

Click the

Save

button to save the settings.

4.5.5 MAC Clone

Choose menu “

Network

”

Æ

“

MAC Clone

”, you can configure the MAC address of the WAN

Interface as shown below.

The WAN Interface List displays the Lay2 Interfaces you have configured on the section

4.5.1

WAN Settings

and its default MAC Address. You can select corresponding WAN Interface from the

drop-down list and click

Clone MAC To

button to clone your current PC MAC, and then click

Save

.

Figure 4-18

TD-W8980

N600 Wireless Dual Band Gigabit ADSL2+ Modem Router User Guide

35

)

Note:

Only the WAN Ports can use MAC Address Clone function. All the clone MAC addresses must not

be the same with each other.

4.5.6 ALG Settings

Choose menu “

Network

”

Æ

“

ALG Settings

”, and then you can configure the basic security in the

screen as shown in Figure 4-19.

Figure 4-19

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

.

TD-W8980

N600 Wireless Dual Band Gigabit ADSL2+ Modem Router User Guide

36

•

H323 ALG:

To allow H323 clients and servers to transfer data across NAT, click

Enable

.

•

SIP ALG:

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

Enable

.

Click the

Save

button to save your settings.

4.5.7 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.

Figure 4-20

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.

4.5.8 IPSec VPN

Choose “

Network

”

Æ

“

IPSec VPN

”, you can Add/Remove or Enable/Disable the IPSec tunnel

connections on the screen as shown in Figure 4-21.

Figure 4-21

This section will guide you to configure a VPN tunnel between two TD-W8980s. The topology is as

follows.