Linksys E900 Router Manual PDF (Setup & Configuration Guide)

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Improving Security

Linksys E-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

(Personal

Identification Number)°

To connect a device using the device’s Wi-Fi Protected Setup PIN:

Wireless > Basic Wireless Settings

Log into the browser-based utility (see “How to open the browser-based

utility” on page 25)°

Click the

Wireless

tab, then, if your router is not an E4200, click the

Basic

Wireless Settings

page°

Click

Wi-Fi Protected Setup

Enter the PIN from the device into the

field on the router’s

Wi-Fi

Protected Setup

screen, then click

After the device has been connected, click

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 > Basic Wireless Settings

Log into the browser-based utility (see “How to open the browser-based

utility” on page 25)°

Click the

Wireless

tab, then, if your router is not an E4200, click the

Basic

Wireless Settings

page°

Click

Wi-Fi Protected Setup

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°

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

Basic 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 57 / 92

Improving Security

Linksys E-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

Log into the browser-based utility (see “How to open the browser-based

utility” on page 25)°

Click the

Wireless

tab, then click the

Wireless MAC Filter

page°

Click

Enabled

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°

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°

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 58 / 92

Improving Security

Linksys E-Series

Click

Save Settings

at the bottom of the page°

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

Log into the browser-based utility (see “How to open the browser-based

utility” on page 25)°

Click the

Security

tab, then click the

Firewall

page° (Not all routers have

the options shown here°)

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°

•

Proxy

—This filter blocks the use of Internet proxy servers° To deny

proxy requests, select this option° Proxy access is allowed by default°

(Not available on the E4200°)

•

Java

—This filter blocks Java, so you may not be able to access Java

content on websites° To deny Java requests, select this option° Java

content is allowed by default° (Not available on the E4200°)

Page 59 / 92

Improving Security

Linksys E-Series

•

ActiveX

—This filter blocks ActiveX, so you may not be able to access

ActiveX content on websites° To deny ActiveX requests, select this

option° ActiveX content is allowed by default° (Not available on the

E4200°)

•

—This filter blocks cookies, which are data stored on your

computer and used by websites when you interact with them° To deny

cookie requests, select this option° Cookie usage is allowed by default°

(Not available on the E4200°)

Click

Save Settings

to update your changes°

IPv6 firewall settings

For

E900

E1200V2

E1500

E2500

E3200

E4200

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

Log into the browser-based utility (see “How to open the browser-based

utility” on page 25)°

Click the

Applications & Gaming

tab, then click the

IPv6 Firewall

page°

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°

Click

Apply

to save your changes° The

Allowing Ports

section lists the

settings you have saved°

To change a saved setting, click

Edit

° To delete a saved setting, click

Remove

Page 60 / 92

Using an External Drive

Linksys E-Series

How to configure storage

For

E3200

E4200

Why would I need to configure storage?

By default, when you connect a

storage device to your router, the entire contents of the device are available for

read and write access to anyone on your local network (no login credentials are

required)° However, you can also create shared folders that you can configure

to share only with specified groups°

To control access to the USB drive attached to your router, you need to

perform two tasks:

Create one or more shared folders (see “How to create shared folders”

below)

Manage group and User Access to Shared Folders (see “How to share

folders and set access rights” on page 53)

How to create shared folders

To create a shared folder:

Storage > Disk

Log into the browser-based utility (see “How to open the browser-based

utility” on page 25)°

Click the

Storage

tab, then click the

Disk

page°

Click

Create Share

next to the partition you want to share° The

Shared

Folder

screen opens°

If you want to share the entire partition, select

Share Entire Partition

then click

Save Settings

at the bottom of the screen°

- OR –

If you want to share a specific folder:

Enter a unique name in the

Display Name

field°

Click

Select

next to the folder name you want to share°

•

To open a subfolder, click

Enter into Folder

•

To navigate to a previous folder, click

Return to Upper Folder

•

To create a new folder, type the name into the

New Folder

field,

then click

Create

Using an External Drive

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