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39

single host in the LAN. Regular web surfing and other such Internet activities from other

clients will continue to work without inappropriate interruption.

DMZ Host

allows a defined

internal user to be totally exposed to the Internet, which usually helps some special

applications such as Netmeeting or Internet Games etc.

The security properties of NAT are somewhat bypassed if you set up DMZ host. We suggest

you to add additional filter rules or a secondary firewall.

Click

DMZ Host

to open the following page:

If you previously have set up

WAN Alias

for

PPPoE

or

Static or Dynamic IP

mode

,

you will

find them in

Aux. WAN IP

for your selection.

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40

Enable

Check to enable the DMZ Host function.

Private IP

Enter the private IP address of the DMZ host, or click Choose PC to

select one.

Choose PC

Click this button and then a window will automatically pop up, as

depicted below. The window consists of a list of private IP addresses

of all hosts in your LAN network. Select one private IP address in

the list to be the DMZ host.

When you have selected one private IP from the above dialog, the IP

address will be shown on the following screen. Click

OK

to save the

setting.

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3.3.3 Open Ports

Open Ports

allows you to open a range of

ports for the traffic of special applications.

Common application of Open Ports includes P2P application (e.g., BT, KaZaA, Gnutella,

WinMX, eMule and others), Internet Camera etc. Ensure that you keep the application

involved up-to-date to avoid falling victim to any security exploits.

Click

Open Ports

to open the following page:

Index

Indicate the relative number for the particular entry that you want to

offer service in a local host. You should click the appropriate index

number to edit or clear the corresponding entry.

Comment

Specify the name for the defined network service.

Local IP Address

Display the private IP address of the local host offering the service.

Status

Display the state for the corresponding entry. X or V is to represent

the

Inactive

or

Active

state.

To add or edit port settings, click one index number on the page. The index entry setup page

will pop up. In each index entry, you can specify

10

port ranges for diverse services.

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42

Enable Open Ports

Check to enable this entry.

Comment

Make a name for the defined network application/service.

WAN IP

Specify the WAN IP address that will be used for this entry. This

setting is available when WAN IP Alias is configured.

Local Computer

Enter the private IP address of the local host or click

Choose PC

to

select one.

Choose PC

Click this button and, subsequently, a window having a list of

private IP addresses of local hosts will automatically pop up. Select

the appropriate IP address of the local host in the list.

Protocol

Specify the transport layer protocol. It could be

TCP

,

UDP

, or

-----

(none) for selection.

Start Port

Specify the starting port number of the service offered by the local

host.

End Port

Specify the ending port number of the service offered by the local

host.

3.4 Applications

Below shows the menu items for Applications.

3.4.1 Dynamic DNS

The ISP often provides you with a dynamic IP address when you connect to the Internet via

your ISP. It means that the public IP address assigned to your router changes each time you

access the Internet. The Dynamic DNS feature lets you assign a domain name to a dynamic

WAN IP address. It allows the router to update its online WAN IP address mappings on the

specified Dynamic DNS server. Once the router is online, you will be able to use the

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43

registered domain name to access the router or internal virtual servers from the Internet. It is

particularly helpful if you host a web server, FTP server, or other server behind the router.

Before you use the Dynamic DNS feature, you have to apply for free DDNS service to the

DDNS service providers. The router provides up to three accounts from three different DDNS

service providers. Basically, Vigor routers are compatible with the DDNS services supplied by

most popular DDNS service providers such as

www.dyndns.org, www.no-ip.com,

www.dtdns.com, www.changeip.com, www.dynamic- nameserver.com.

You should visit

their websites to register your own domain name for the router.

Enable the Function and Add a Dynamic DNS Account

1.

Assume you have a registered domain name from the DDNS provider, say

hostname.dyndns.org

, and an account with username:

test

and password:

test

.

2.

In the DDNS setup menu, check

Enable Dynamic DNS Setup

.

Set to Factory Default

Clear all profiles and recover to factory settings.

Enable Dynamic DNS Setup

Check this box to enable DDNS function.

Index

Click the number below Index to access into the setting

page of DDNS setup to set account(s).

Domain Name

Display the domain name that you set on the setting page

of DDNS setup.

Active

Display if this account is active or inactive.

View Log

Display DDNS log status.

Force Update

Force the router updates its information to DDNS server.

3.

Select Index number 1 to add an account for the router. Check

Enable Dynamic DNS

Account

, and choose correct Service Provider: dyndns.org, type the registered hostname:

hostname

and domain name suffix: dyndns.org in the

Domain Name

block. The

following two blocks should be typed your account Login Name:

test

and Password:

test

.