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Page 76 / 357 Scroll up to view Page 71 - 75
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.
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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.
Page 78 / 357
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.
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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.
Page 80 / 357
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.

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