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Page 71 / 131 Scroll up to view Page 66 - 70
¶1
Enable Port Trigger
: Choose
YES
to enable Port Trigger.
Well-Known Applications
: Select popular games and web
services to add to the Port Trigger List.
Description
: Enter a short name or description for the service.
Trigger Port
: Specify a trigger port to open the incoming
port.
Protocol
: Select the protocol, TCP, or UDP.
Incoming Port
: Specify an incoming port to receive inbound
data from the Internet.
Protocol
: Select the protocol, TCP, or UDP.
NOTES:
•
When connecting to an IRC server, a client PC makes an outgoing
connection using the trigger port range 66660-7000. The IRC server
responds by verifying the username and creating a new connection
to the client PC using an incoming port.
•
If Port Trigger is disabled, the router drops the connection because
it is unable to determine which PC is requesting for IRC access.
When Port Trigger is enabled, the router assigns an incoming port to
receive the inbound data. This incoming port closes once a specific
time period has elapsed because the router is unsure when the
application has been terminated.
•
Port triggering only allows one client in the network to use a
particular service and a specific incoming port at the same time.
•
You cannot use the same application to trigger a port in more than
one PC at the same time. The router will only forward the port back
to the last computer to send the router a request/trigger.
•
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Page 72 / 131
¶±
4.3.3 Virtual Server/Port Forwarding
Port forwarding is a method to direct network traffic from the
Internet to a specific port or a specific range of ports to a device
or number of devices on your local network. Setting up Port
Forwarding on your router allows PCs outside the network to
access specific services provided by a PC in your network.
NOTE:
When port forwarding is enabled, the ASUS router blocks
unsolicited inbound traffic from the Internet and only allows replies
from outbound requests from the LAN. The network client does not
have access to the Internet directly, and vice versa.
To set up Port Forwarding:
1. From the navigation panel, go to
Advanced Settings
>
WAN
>
Virtual Server / Port Forwarding
tab.
2. On the
Enable Port Forwarding
item, select
Yes
.
3. Select either a server or game from the F
amous Server List
or
Famous Game List
. The
Port Forwarding
information will be
automatically filled out on the
Forwarding List
. Click the
Add
button.
Page 73 / 131
¶²
4. If the server or game is not on the
Famous Server
or
Famous
Game List
, input the
Port Forwarding
information manually
and click the
Add
button.
5. Click
Apply
.
Enable Port Forwarding
: Choose
YES
to enable Port
Forwarding.
Famous Server List
: Determine which type of service you
want to access.
Famous Game List
: This item lists ports required for popular
online games to work correctly.
FTP Server Port
: Avoid assigning the port range 20:21 for
your FTP server as this would conflict with the router’s native
FTP server assignment.
Service Name
: Enter a service name.
Port Range
: If you want to specify a Port Range for clients
on the same network, enter the Service Name, the Port
Range (e.g. 10200:10300), the LAN IP address, and leave the
Local Port empty. Port range accepts various formats such
as Port Range (300:350), individual ports (566,789) or Mix
(1015:1024,3021).
NOTES:
•
When your network’s firewall is disabled and you set 80 as the HTTP
server’s port range for your WAN setup, then your http server/web
server would be in conflict with the router’s web user interface.
•
A network makes use of ports in order to exchange data, with each
port assigned a port number and a specific task. For example, port 80
is used for HTTP. A specific port can only be used by one application
or service at a time. Hence, two PCs attempting to access data
through the same port at the same time would fail. For example, you
cannot set up Port Forwarding for port 100 for two PCs at the same
time.
•
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•
•
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•
Page 74 / 131
¶³
Local IP
: Key in the client’s LAN IP address.
NOTE
: Use a static IP address for the local client to make port forwarding
work properly. Refer to section
4.2 LAN
for information.
Local Port
: Enter a specific port to receive forwarded packets.
Leave this field blank if you want the incoming packets to be
redirected to the specified port range.
Protocol
: Select the protocol. If you are unsure, select
BOTH
.
To check if Port Forwarding has been configured successfully:
Ensure that your server or application is set up and running.
You will need a client outside your LAN but has Internet
access (referred to as “Internet client”). This client should not
be connected to the ASUS router.
On the Internet client, use the router’s WAN IP to access the
server. If port forwarding has been successful, you should be
able to access the files or applications.
Differences between port trigger and port forwarding:
Port triggering will work even without setting up a specific
LAN IP address. Unlike port forwarding, which requires a
static LAN IP address, port triggering allows dynamic port
forwarding using the router. Predetermined port ranges are
configured to accept incoming connections for a limited
period of time. Port triggering allows multiple computers
to run applications that would normally require manually
forwarding the same ports to each PC on the network.
Port triggering is more secure than port forwarding since the
incoming ports are not open all the time. They are opened
only when an application is making an outgoing connection
through the trigger port.
•
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Page 75 / 131
¶´
Setting up a port trigger is applicable if you use similar
applications in two PCs during different times of the day.
However, it is not suitable for servers behind a router
because it relies on specific applications to make an outgoing
connection before it can receive incoming ones. Port
forwarding can be configured for a server located behind a
router.
4.3.4 DMZ
Virtual DMZ exposes one client to the Internet, allowing this
client to receive all inbound packets directed to your Local Area
Network.
Inbound traffic from the Internet is usually discarded and routed
to a specific client only if port forwarding or a port trigger has
been configured on the network. In a DMZ configuration, one
network client receives all inbound packets.
Setting up DMZ on a network is useful when you need incoming
ports open or you want to host a domain, web, or e-mail server.
Caution:
Opening all the ports on a client to the Internet makes the
network vulnerable to outside attacks. Please be aware of the security
risks involved in using DMZ.
To set up DMZ:
1. From the navigation panel, go to
Advanced Settings
>
WAN
>
DMZ
tab.
2. On the
IP Address of Exposed Station
text box, enter the IP
address of the computer which you want to assign to DMZ.
IP address of Exposed Station: Key in the client’s LAN IP address that will
provide the DMZ service and be exposed on the Internet. Ensure that
the server client has a static IP address.
To remove DMZ:
1. Delete the client’s LAN IP address from the
IP Address of
Exposed Station
text box.
2. When done, click
Apply
.
•

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