Vigor2830 Series User’s Guide

64

3.3.2 DMZ Host

As mentioned above,

Port Redirection

can redirect incoming TCP/UDP or other traffic on

particular ports to the specific private IP address/port of host in the LAN. However, other IP

protocols, for example Protocols 50 (ESP) and 51 (AH), do not travel on a fixed port. Vigor

router provides a facility

DMZ Host

that maps ALL unsolicited data on any protocol to a

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.

Note:

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:

DMZ Host for WAN2 and WAN3 is slightly different with WAN1. See the following figure.

Vigor2830 Series User’s Guide

65

If you previously have set up

WAN Alias

for

PPPoE

or

Static or Dynamic IP

mode in

WAN2 interface

,

you will find them in

Aux. WAN IP

for your selection.

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.

Vigor2830 Series User’s Guide

66

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.

WAN Interface

Display the WAN interface for such NAT profile.

Aux. WAN IP

Display the WAN IP address specified in WAN IP Alias page.

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

20

port ranges for diverse services.

Vigor2830 Series User’s Guide

67

Enable Open Ports

Check to enable this entry.

Comment

Make a name for the defined network application/service.

WAN Interface

Specify the WAN interface that will be used for this entry.

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.

Vigor2830 Series User’s Guide

68

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

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

.

Enable Dynamic DNS

Setup

Check this box to enable DDNS function.

Set to Factory Default

Clear all profiles and recover to factory settings.

Auto-Update interval

Set the time for the router to perform auto update for

DDNS service.

Index

Click the number below Index to access into the setting

page of DDNS setup to set account(s).

WAN Interface

Display the WAN interface used.

Domain Name

Display the domain name that you set on the setting page

of DDNS setup.