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Page 41 / 71 Scroll up to view Page 36 - 40
38
Improving Security
Linksys EA-Series
To manually set your router’s wireless security settings:
Wireless > Wireless Settings
1.
Log into the browser-based utility (see “How to open the browser-based
utility” on page 20).
2.
Click the
Wireless
tab, then click the
Wireless Settings
page.
3.
Select your preferred security type from the
Security Mode
drop-down
list For most home networks, we recommend
WPA2/WPA Mixed Mode
.
4.
Enter a passphrase (security key) for your wireless network in the
Passphrase
field. The most secure type of security key should include a
mix of uppercase and lowercase letters, numbers, and punctuation.
5.
Click
Save Settings
at the bottom of the screen.
How to set up wireless security using
Wi-Fi Protected Setup
For
ALL
Why would I use Wi-Fi Protected Setup?
Wi-Fi Protected Setup™ is a feature
of your router that makes it easy to add devices to your wireless network. If you
have network devices, such as wireless printers, that support Wi-Fi Protected
Setup, then you can use Wi-Fi Protected Setup to add the devices.
Wi-Fi Protected Setup activity light
The power indicator light on the back of the router (or on top for the EA4500)
indicates the status of Wi-Fi Protected Setup while you are connecting devices.
•
When Wi-Fi Protected Setup is connecting a network device, the light
flashes slowly.
•
If there is an error, the light flashes quickly for two minutes. Wait until it
stops flashing, then try again.
•
When Wi-Fi Protected Setup has finished connecting a device, the light
is continuously lit .
•
Wait until the light is continuously lit before starting the next Wi-Fi
Protected Setup session.
Connect network devices using one of the three methods below.
NOTE
Wi-Fi Protected Setup configures one device at a time. Repeat the
instructions for each device that supports Wi-Fi Protected Setup.
Connecting a device using the Wi-Fi Protected Setup
button
Use this method if your device has a Wi-Fi Protected Setup button or prompts
you to press the Wi-Fi Protected Setup button on your router.
To connect a device using the Wi-Fi Protected Setup button:
Wireless > Wireless Settings
1.
Press the
Wi-Fi Protected Setup
button on the network device you are
connecting to.
2.
Press the
Wi-Fi Protected Setup
button on the back of the router.
- OR -
a.
Log into the browser-based utility (see “How to open the browser-
based utility” on page 20).
b.
Click the
Wireless
tab.
c.
Click
Wi-Fi Protected Setup
.
d.
Click the
Wi-Fi Protected Setup
button in the router’s
Wi-Fi Protected
Setup
screen.
e.
After the device has been configured, click
OK
.
Page 42 / 71
39
Improving Security
Linksys EA-Series
How to connect a device using its Wi-Fi Protected
Setup PIN
Use this method if your device has a Wi-Fi Protected Setup
PIN
(Personal
Identification Number).
To connect a device using the device’s Wi-Fi Protected Setup PIN:
Wireless > Wireless Settings
1.
Log into the browser-based utility (see “How to open the browser-based
utility” on page 20).
2.
Click the
Wireless
tab.
3.
Click
Wi-Fi Protected Setup
.
4.
Enter the PIN from the device into the
PIN
field on the router’s
Wi-Fi
Protected Setup
screen, then click
Register
.
5.
After the device has been connected, click
OK
.
How to connect a device using the router’s Wi-Fi
Protected Setup PIN
Use this method if your client device asks for the router’s PIN.
To connect a device using the device’s Wi-Fi Protected Setup PIN:
Wireless > Wireless Settings
1.
Log into the browser-based utility (see “How to open the browser-based
utility” on page 20).
2.
Click the
Wireless
tab.
3.
Click
Wi-Fi Protected Setup
.
4.
On the client device, enter the PIN listed on the router’s
Wi-Fi Protected
Setup
screen. It is also listed on the bottom of the router. In the example
below, the router’s PIN is 32744781.
5.
Follow the device’s instructions to complete setup.
How to connect a device manually
If you have devices that do not support Wi-Fi Protected Setup, note the wireless
settings in the
Wireless Settings
screen, then manually configure those devices.
For each wireless network, the Network Name (SSID), Security, and Passphrase
are displayed at the bottom of the screen.
Page 43 / 71
40
Improving Security
Linksys EA-Series
How to control access to your wireless
network
For
ALL
Why would I need to control access to my wireless network?
If you used
Cisco Connect to configure your router, your wireless network is already secure.
By default, Cisco Connect enables industry-standard
WPA
(Wi-Fi Protected
Access) security using WPA2/WPA mixed mode. Cisco Connect configures your
network with a complex, 10-character password that is almost impossible
to compromise. If you set up your wireless network manually and have not
enabled wireless security, your wireless network will be an “open” network that
almost anyone nearby with a Wi-Fi-enabled device could access.
What is MAC filtering?
The best way to secure your wireless network is to use
Cisco Connect to automatically configure and secure it. However, if you choose
not to use the built-in security features of your router, you can still control
access to your wireless network using MAC filtering.
Every network device has a unique, 12-digit
MAC
(Media Access Control)
address. Using MAC filtering, you can allow only known MAC addresses onto
your network. You can also exclude specific MAC addresses or deny them
access to your wireless network.
Example
: Because each MAC filtering configuration is unique, the following
procedure uses the simplified example of setting up MAC filtering to allow one
wireless device access to the network.
To set up MAC filtering to allow one wireless device access to your
network:
Wireless > Wireless MAC Filter
1.
Log into the browser-based utility (see “How to open the browser-based
utility” on page 20).
2.
Click the
Wireless
tab, then click the
Wireless MAC Filter
page.
3.
Click
Enabled
.
4.
Select
Permit
.
TIP
You can also use MAC filtering to prevent specific PCs from
accessing your network by selecting
Prevent
. However, it’s easier
to permit only known devices than to exclude unknown devices.
5.
Click
Wireless Client List
. A separate window opens and displays the
currently connected devices. In the example below, the only device
permitted onto the network is the MacBook. However, two other devices
are also connected to the network.
6.
Next to the device entry, select
Save to MAC Address Filter List
, then
click
Add
. The Mac Address Filter List is updated with the MAC address of
the device you added.
Page 44 / 71
41
Improving Security
Linksys EA-Series
7.
Click
Save Settings
at the bottom of the page.
8.
Click
Wireless Client List
again to check the updated device list. Only
the device you selected remains on the network.
How to improve security using the built-in firewall
Why would I need to change my security settings?
By default, the firewall
settings in your router have been optimized for most home environments, so
no changes are needed. The
SPI
(Stateful Packet Inspection) firewall is enabled
by default. In addition, anonymous Internet requests and IDENT requests are
filtered by default. All web filters are disabled, because enabling them may
cause problems for sites that depend on ActiveX controls, Java, or cookies.
General firewall settings
To change your firewall settings:
Security > Firewall
1.
Log into the browser-based utility (see “How to open the browser-based
utility” on page 20).
2.
Click the
Security
tab, then click the
Firewall
page.
3.
Select each setting that you want to change.
TIP
For descriptions of the filters, click
Help
on the right side of the
screen. More complete descriptions are included below.
•
SPI Firewall Protection
—This helps protect your local network from
Internet threats. This option is enabled by default. On some router
models, this setting is separated into IPv6 and IPv4 options so that
each can be handled separately.
CAUTION
To help protect your network, you should keep this option enabled.
•
Filter Anonymous Internet Requests
—This filter blocks Internet
requests from unknown sources such as ping requests. This option is
enabled by default.
•
Filter Multicast
—Multicasting allows a single transmission to
simultaneously reach specific recipients within your local network.
Select this option to block multicasting. This option is disabled by
default.
•
Filter Internet NAT Redirection for IPv4 Internet Only
—This filter
prevents a local computer from using a URL or Internet IP address
to access the local server. Select this option to enable the filter. This
option is disabled by default. On some router models, this setting
applies to IPv4 Internet only.
•
Filter IDENT (Port 113)
—This filter prevents port 113 from being
scanned by devices from the Internet. This option is enabled by
default.
4.
Click
Save Settings
to update your changes.
Page 45 / 71
42
Improving Security
Linksys EA-Series
IPv6 firewall settings
For
ALL
On some router models, the IPv6 firewall lets you customize IPv6 port services
for applications. When users send these types of requests to your network via
the Internet, the router will allow those requests to the appropriate computers.
NOTE
To use your router’s IPv6 Internet connectino settings, IPv6 service
from your ISP (Internet service provider) is required. For more
information on this service, ask your ISP.
To set IPv6 firewall settings:
Applications & Gaming > IPv6 Firewall
1.
Log into the browser-based utility (see “How to open the browser-based
utility” on page 20).
2.
Click the
Applications & Gaming
tab, then click the
IPv6 Firewall
page.
3.
Select each setting that you want to change.
•
Description
—Enter a description of the application.
•
IPv6 Address
—Enter the IPv6 address of the computer that should
receive the traffic.
•
Allow
—Select the protocol(s) and range of port(s) used by incoming
traffic.
4.
Click
Apply
to save your changes. The
Allowing Ports
section lists the
settings you have saved.
5.
To change a saved setting, click
Edit
. To delete a saved setting, click
Remove
.

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