Page 41 / 108 Scroll up to view Page 36 - 40
WRT 1900AC
|
Setting Up: Advanced
38
In the
Source IP Address
section, select
Any IP Address
to allow access to
your DMZ device from the entire Internet, or select the alternate button and
enter a range of allowed source addresses.
In the
Destination IP Address
section, enter the last three digits of the IP
address of the device that will be in the DMZ. The rest of the IP address is
already completed.
- OR -
If you want to specify the 12-digit MAC address of the device instead of setting up
a DHCP address reservation, you can replace Step 6 with the following steps:
In the
Destination IP Address
section, select
MAC Address
, then click
View DHCP
Client Table
. The
DHCP Client Table
screen opens.
Click
Select
next to the device that you want to place in the DMZ, then click
Close
. The corresponding MAC address is copied into the
MAC Address
field.
Click
OK
.
Page 42 / 108
WRT 1900AC
|
Port Forwarding and Port Triggering
39
HOW TO SET UP PORT FORWARDING
Why would I use port forwarding?
Port forwarding is a feature that forwards
inbound traffic from the Internet on a specific port or ports to a specific device or
port on your local network. You can set up port forwarding for the following:
A single port (see “How to set up port forwarding for a single port” below)
Multiple ports (see “How to set up port forwarding for multiple ports” on page 39)
A range of ports (see “How to set up port forwarding for a range of ports” on page 40)
HOW TO SET UP PORT FORWARDING FOR A SINGLE PORT
Single port forwarding forwards inbound traffic from the Internet on a specific
port to a single device on your local network. An example of single port forwarding
would be sending inbound Web requests, typically on port 80, to a Web server.
Tip:
See the device’s documentation for port and protocol information.
To set up single port forwarding, do the following:
Follow your device’s instructions for configuring it with a static IP address or use
DHCP reservation to assign it a permanent address (see “How to set up the DHCP
server on your router” on page 27).
Log in to Linksys Smart Wi-Fi. (See “How to connect to Linksys Smart Wi-Fi” on page
¶.)
Under
Router Settings
, click
Security
.
Click the
Apps and Gaming
tab.
Click
Single Port Forwarding
. The
Single Port Forwarding
screen opens.
Click
Add a new Single Port Forwarding
.
In the
Application name
field, enter a descriptive name.
In the
External Port
field, type the external port number (not always required).
In the
Internal Port
field, type the internal port number (not always required).
In the
Protocol
drop-down list, select TCP, UDP, or Both (default).
In the
Device IP#
field, enter the last three digits of the IP address you have
reserved for the computer you want to forward Internet traffic to. The rest of
the IP address has already been completed for you.
Select
Enabled
, then click
Save
. If you don’t want to use port forwarding but want
to keep the information in the table, unselect the checkbox.
HOW TO SET UP PORT FORWARDING FOR MULTIPLE PORTS
Some applications require forwarding of multiple ports. VNC (Virtual Network
Computing) software that allows you to operate your computer remotely from
anywhere on the Internet is an example of an application that requires multiple
ports to be forwarded. To forward to multiple ports, create additional entries to
forward additional ports to the same IP address.
Example
: You want to set up your computer so you can remotely access it using
VNC software. By default, VNC uses TCP ports 5800 and 5900.
To set up single port forwarding for multiple ports, do the following:
Make sure that the software you want to use has been installed on a networked
computer.
Log in to Linksys Smart Wi-Fi. (See “How to connect to Linksys Smart Wi-Fi” on
page ¶.)
Set up DHCP reservation for the IP address of the computer on which you
installed the software. (See “How to set up the DHCP server on your router”
on page 27.)
Under
Router Settings
, click
Security
.
Click the
Apps and Gaming
tab.
Click
Single Port Forwarding
. The
Single Port Forwarding
screen opens.
Click
Add a new Single Port Forwarding
.
In the
Application name
field, enter a descriptive name.
Enter in the same port number for the
External Port
and the
Internal Port
.
In the
Protocol
drop-down list, select
TCP
,
UDP
, or
Both
(default).
In the
Device IP
# field, enter the last three digits of the IP address you have
reserved for the computer you want to forward Internet traffic to. The rest of
the IP address has already been completed for you.
Select
Enabled
, then click
Save
. If you don’t want to use port forwarding but want
to keep the information in the table, deselect the checkbox.
Note:
If you want to use software such as VNC on multiple computers, you will need to
reconfigure the default ports that VNC uses on each additional computer. Then,
create additional port forwarding entries for each additional computer. See your
software’s documentation for help..
Port Forwarding and Port Triggering
Page 43 / 108
WRT 1900AC
|
Port Forwarding and Port Triggering
40
HOW TO SET UP PORT FORWARDING FOR A RANGE OF PORTS
Some applications require forwarding to a range of ports.
Example
: You want to set up your computer so you can use BitTorrent, a popular
peer-to-peer file sharing application. BitTorrent uses port 6881 by default. If that
port is busy, the requesting BitTorrent client tries the next port in sequence. The
most common configuration for home routers with a single BitTorrent computer
is to set up port forwarding using a range of ports starting with 6881 and ending
with port 6889.
To set up port range forwarding, do the following:
Log in to Linksys Smart Wi-Fi. (See “How to connect to Linksys Smart Wi-Fi” on
page ¶.)
Set up a DHCP reservation for the IP address of the computer on which you
installed the software. (See “How to set up the DHCP server on your router” on
page 27.) In this example, the IP address of the desktop computer with BitTorrent
installed is 192.168.1.140.
Under
Router Settings
, click
Security
.
Click the
Apps and Gaming
tab.
Click
Port Range Forwarding
. The
Port Range Forwarding
screen opens.
Click
Add a new Port Range Forwarding
.
In the
Application
name field, enter a descriptive name.
In the
Start ~ End Port
fields, enter the range or ports. In this example, the range
is “6881 – 6889”.
Select
TCP
as the protocol.
In the
Device IP#
field, enter the last 3 digits of the IP address of the device
running the software. The rest of the IP address fields already completed. In
this example, you would enter “140”.
Select
Enabled
, then click
Save
. If you don’t want to use port range forwarding but
want to keep the information in the table, deselect the checkbox.
Tips:
To use software like BitTorrent on multiple computers on your network, create
additional entries with a unique range of ports as shown above. BitTorrent works
only with ports between 688
1
and 6999.
Depending on your computer’s firewall software, you may need to open a range
of ports in your firewall to enable software that uses port range forwarding
Page 44 / 108
WRT 1900AC
|
Port Forwarding and Port Triggering
HOW TO SET UP PORT RANGE TRIGGERING FOR ONLINE
GAMING
Port range triggering allows the router to watch outgoing data for specific port
numbers. The IP address of the computer that sends the matching data is remem-
bered by the router, so that when the requested data returns through the router,
the data is routed back to the proper computer. An example of port range trigger-
ing would be to enable a USB or Bluetooth headset for online chat and gaming.
To set up port range triggering for multiple entries, do the following:
See your device documentation for information on the ports that the device uses.
Log in to Linksys Smart Wi-Fi. (See “How to connect to Linksys Smart Wi-Fi” on
page ¶.)
Under
Router Settings
, click
Security
.
Click the
Apps and Gaming
tab.
Click
Port Range Triggering
. The
Port Range Triggering
screen opens.
Click
Add a new Port Range Triggering
.
In the
Device or Application
field, enter a descriptive name (such as “PS3
Headset”).
For single ports, enter the same port number in each
Triggered range
and
Forwarded range
field.
For port ranges, enter the same number ranges in each set of
Triggered Range
and
Forwarded Range
fields.
Select
Enabled
, then click
Save
. If you don’t want to use port range triggering
but want to keep the information in the table, deselect the checkbox.
Page 45 / 108
Maintaining and Monitoring
WRT 1900AC
|
Maintaining and Monitoring
42
HOW TO BACK UP AND RESTORE YOUR ROUTER
CONFIGURATION
As with any valuable data, you should back up your router configuration. Your
router might contain many customized settings. Those settings would be lost if
you reset your router to its factory defaults, and you would need to re-enter all of
them manually. If you back up your router configuration, restoring settings is easy.
Note:
You can only back up the router configuration locally (not remotely).
To back up your router configuration, do the following:
Log in to Linksys Smart Wi-Fi. (See “How to connect to Linksys Smart Wi-Fi” on
page ¶.)
Under
Router Settings
, click
Troubleshooting
.
Click the
Diagnostics
tab.
Under
Router configuration
, click
Backup
. You are prompted to save the file.
Specify a file location, then click
Save
.
Tip:
For save multiple backup files, include the backup date in the filename as you
save.
To restore your router configuration:
Log in to Linksys Smart Wi-Fi. (See “How to connect to Linksys Smart Wi-Fi”
on page ¶.)
Under
Router Settings
, click
Troubleshooting
.
Click the
Diagnostics
tab.
Under
Router configuration
, click
Restore
. The
Restore Router Configuration
dialog box opens.
Click
Choose File
to navigate to the location of your configuration file, then
select the file and click
Open
.
To restore the configuration, click
Start to Restore
.

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