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TD-W8910G
54M Wireless ADSL2+ Router User Guide
5.4.3.1. Virtual Servers
Choose “
Advanced Setup
”
Æ
“
NAT
”
Æ
“
Virtual Servers
”, you can set up virtual servers on the
screen below (shown in Figure 5-17).
Virtual servers can be used for setting up public services on your LAN, such as DNS, Email and
FTP. A virtual server is defined as a service port, and all requests from the Internet to this service
port will be redirected to the computer specified by the server IP. Any PC that was used for a
virtual server must have a static or reserved IP Address because its IP Address may change
when using the DHCP function.
Figure 5-17
¾
Virtual Server Table:
The table indicates the information about the Virtual Server entries.
±
Server Name:
This is the name of the
Virtual Server
. It is exclusive and must be filled
in.
±
External Port Start:
The base number of External Ports. You can type a service port or
leave it blank.
±
External Port End:
The end number of External Ports. You can type a service port or
leave it blank.
±
Protocol:
The protocol used for this application,
TCP
,
UDP
, or
TCP/UDP
.
±
Internal Port Start:
The base number of Internal Ports. You can type a service port or
leave it blank.
±
Internal Port End:
The end number of Internal Ports. You can type a service port or
leave it blank.
±
Server IP Address:
The IP Address of the PC providing the service application.
¾
Add:
Click the
Add
button to add a new entry.
¾
Remove:
Select the check box in the table (shown in Figure 5-17) and then click the
Remove
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TD-W8910G
54M Wireless ADSL2+ Router User Guide
button, then the corresponding entry will be deleted in the table.
To setup a virtual server entry:
1.
Click the
Add
button on the screen above (pop-up Figure 5-17), and then you will set the
new Virtual Server in the next screen (shown in Figure 5-18).
Figure 5-18
2.
Select the service which you want to use from the drop-down list. If the list does not have the
service you need, type the name of the custom service in the text box.
3.
Type the IP Address of the computer in the
Server IP Address
text
box.
4.
Enter the External Port Start, External Port End, Internal Port Start and Internal Port End in
the table, and then select the protocol used for this Virtual Server,
TCP
,
UDP
or
All
.
5.
Click the
Save/Apply
button to enable virtual server.
Note:
If you select the service from the drop-down list, the External Port Start, External Port End,
Internal Port Start, Internal Port End and the Protocol will be added in the table automatically.
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TD-W8910G
54M Wireless ADSL2+ Router User Guide
You only need to enter the Server IP Address for the Virtual Server.
5.4.3.2. Port Triggering
Choose “
Advanced Setup
”
Æ
“
NAT
”
Æ
“
Port Triggering
”, you can set Port Triggering on the
screen (shown in Figure 5-19).
Some applications require that specific ports in the Router's firewall should be opened for access
by remote devices. Port Trigger dynamically opens up the 'Open Ports' in the firewall when an
application on the LAN initiates a TCP/UDP connection to a remote device using the triggering
ports. The Router allows the remote party from the WAN side to establish new connections back
to the application on the LAN side using the open ports. A maximum 32 entries can be configured.
Figure 5-19
¾
Port Triggering Table:
The table indicates the information about the Port Triggering entries.
±
Application (Name):
This is the name of the
Port Triggering
. It is exclusive and must
be filled.
±
Trigger:
It includes the Protocol and the Start and End value of the Trigger Ports.
±
Open:
It includes the Protocol and the Start and End value of the Open Ports
¾
Add:
Click the button to add a new entry.
¾
Remove:
Select the check box in the table (shown in Figure 5-19) and then click the
Remove
button, then the corresponding entry will be deleted in the table.
To add a new Port Triggering:
1.
Click the
Add
button (pop-up Figure 5-19), and then you will set the new Port Triggering in
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TD-W8910G
54M Wireless ADSL2+ Router User Guide
the next screen (shown in Figure 5-20).
Figure 5-20
2.
Select the application from the drop-down list. If the list does not have the application that
you want, select the
Custom application
radio-button, and type the name of the custom
application in the text box.
3.
Enter the
Trigger Port Start
,
Trigger Port End
,
Open Port Start
and
Open Port End
in the
table, and then select the
Trigger protocol
and
Open protocol
,
TCP
,
UDP
or
All
.
4.
Click the
Save/Apply
button to enable the settings.
Note:
If you select the application from the drop-down list, the External Port Start, External Port End,
Internal Port Start, Internal Port End and the Protocol will be added in the table automatically.
5.4.3.3. DMZ Host
Choose “
Advanced Setup
”
Æ
“
NAT
”
Æ
“
DMZ Host
”, you can set up DMZ Host on the screen
(shown in Figure 5-21).
The DMZ host feature can make a local host be exposed to the Internet for a special-purpose
service, such as online gaming or video conferencing.
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TD-W8910G
54M Wireless ADSL2+ Router User Guide
Figure 5-21
To add a new DMZ Host
:
You can enter the computer's IP address and then click
Save/Apply
to activate the DMZ host you
set on this page.
Note:
DMZ host forwards all the ports at the same time. Any PC whose port is being forwarded must
have its DHCP client function disabled and should have a new static IP Address assigned to it
because its IP Address may change while using the DHCP function.
5.4.3.4. ALG
Choose “
Advanced Setup
”
Æ
“
NAT
”
Æ
“
ALG
”, you can Enable SIP (Session Initiation Protocol) on
the ALG (Application Level Gateway) screen (shown in Figure 5-22).
Figure 5-22
5.4.4 Security
When you select the
Enable Security
function (shown in Figure 5-11) for the connection type of
MER
or
IPoA
for the WAN Setup, or when you setup
Bridge
,
PPPoA or PPPoE
mode for WAN
interface, you will see the
Security
menu in the Web-based Utility (shown in Figure 5-23). It
includes
IP Filtering
,
MAC Filtering
(only effective in Bridge mode) and
Parental Control
submenus.
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