Cisco Linksys-E2000 Router Manual PDF (Setup & Configuration Guide)

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Advanced Wireless-N Router

Linksys E2000

Chapter 3: Advanced Configuration

MAC Address Filter List

Wireless Client List

Click this option to open the

Wireless

Client List

screen°

Wireless Client List

This screen shows computers and other devices on

the wireless network° The list can be sorted by Client

Name, Interface, IP Address, MAC Address, and Status°

Select

Save to MAC Address Filter List

for any device

you want to add to the MAC Address Filter List° Then

click

Add

To update the on-screen information, click

Refresh

To exit this screen and return to the

Wireless MAC Filter

screen, click

MAC 01-50

Enter the MAC addresses of the devices

whose wireless access you want to control°

Click

Save Settings

to apply your changes, or click

Cancel

Changes

to clear your changes°

Wireless > Advanced Wireless Settings

This

Advanced Wireless Settings

screen is used to set up

the Router’s advanced wireless functions° These settings

should only be adjusted by an advanced user because

incorrect settings can reduce wireless performance° In

most cases, keep the default settings°

Wireless > Advanced Wireless Settings

Advanced Wireless

AP Isolation

The AP (Access Point) Isolation feature

isolates all wireless clients and wireless devices on your

network from each other° Wireless devices will be able to

communicate with the Router but not with each other° To

use this option, select

Enabled

° AP Isolation is disabled by

default°

Frame Burst

Enabling this option should provide your

network with greater performance, depending on the

manufacturer of your wireless products° To use this option,

keep the default,

Enabled

° Otherwise, select

Disabled

Authentication Type

The Authentication Type setting

is available if the Security Mode is RADIUS or WEP° The

default is set to

Auto

, which allows either Open System

or Shared Key authentication to be used° With Open

System authentication, the sender and the recipient do

NOT use a WEP key for authentication° With Shared Key

authentication, the sender and recipient use a WEP key for

authentication° Select

Shared Key

to only use Shared Key

authentication°

Basic Rate

The Basic Rate setting is not actually one

rate of transmission but a series of rates at which the

Router can transmit° (The Basic Rate is not the actual rate

of data transmission° If you want to specify the Router’s

rate of data transmission, configure the Transmission

Rate setting°) The Router will advertise its Basic Rate to

the other wireless devices in your network, so they know

which rates will be used° The Router will also advertise that

it will automatically select the best rate for transmission°

The default setting is

Default

, when the Router can

transmit at all standard wireless rates (1-2 Mbps, 5°5 Mbps,

11 Mbps, 18 Mbps, and 24 Mbps)° Select

1-2Mbps

for

use with older wireless technology° Select

All

, when the

Router can transmit at all wireless rates°

Transmission Rate

The Transmission setting is available

if the Network Mode is BG-Mixed, Wireless-G Only, or

Wireless-B Only° The rate of data transmission should be

set depending on the speed of your wireless network°

Select from a range of transmission speeds, or keep the

default,

Auto

, to have the Router automatically use the

fastest possible data rate and enable the Auto-Fallback

feature° Auto-Fallback will negotiate the best possible

connection speed between the Router and a wireless

client°

N Transmission Rate

The N Transmission setting is

available if the Network Mode is Mixed or Wireless-N Only°

The rate of data transmission should be set depending

on the speed of your Wireless-N networking° Select from

a range of transmission speeds, or keep the default,

Auto

, to have the Router automatically use the fastest

possible data rate and enable the Auto-Fallback feature°

Auto-Fallback will negotiate the best possible connection

speed between the Router and a wireless client°

Page 27 / 59

Advanced Wireless-N Router

Linksys E2000

Chapter 3: Advanced Configuration

CTS

Protection

Mode

The

Router

automatically

uses CTS (Clear-To-Send) Protection Mode when your

Wireless-N and Wireless-G devices are experiencing severe

problems and are not able to transmit to the Router in an

environment with heavy 802°11b traffic° This option boosts

the Router’s ability to catch all Wireless-N and Wireless-G

transmissions but severely decreases performance° To use

this option, keep the default,

Auto

° To disable this option,

select

Disabled

Beacon Interval

A beacon is a packet broadcast by the

Router to synchronize the wireless network° The Beacon

Interval value indicates the frequency interval of the

beacon° Enter a value between 20 and 65,535 milliseconds°

The default value is

100

DTIM Interval

This value, between 1 and 255, indicates

the interval of the Delivery Traffic Indication Message

(DTIM)° A DTIM field is a countdown field informing

clients of the next window for listening to broadcast

and multicast messages° When the Router has buffered

broadcast or multicast messages for associated clients, it

sends the next DTIM with a DTIM Interval value° Its clients

hear the beacons and awaken to receive the broadcast

and multicast messages° The default value is

Fragmentation

Threshold

This

value

specifies

the

maximum size for a packet before data is fragmented

into multiple packets° If you experience a high packet

error rate, you may slightly increase the Fragmentation

Threshold° Setting the Fragmentation Threshold too low

may result in poor network performance° Only minor

reduction of the default value is recommended° In most

cases, it should remain at its default value of

2346

RTS Threshold

Should you encounter inconsistent data

flow, only minor reduction of the default value,

2347

, is

recommended° If a network packet is smaller than the

preset Request to Send (RTS) threshold size, the RTS/CTS

(Clear to Send) mechanism will not be enabled° The Router

sends RTS frames to a particular receiving station and

negotiates the sending of a data frame° After receiving

an RTS, the wireless station responds with a CTS frame

to acknowledge the right to begin transmission° The RTS

Threshold value should remain at its default value of

2347

Click

Save Settings

to apply your changes, or click

Cancel

Changes

to clear your changes°

Security > Firewall

The

Firewall

screen is used to configure a firewall that can

filter out various types of unwanted traffic on the Router’s

local network°

Security > Firewall

Firewall

SPI Firewall Protection

To use firewall protection,

keep the default selection,

Enabled

° To turn off firewall

protection, select

Disabled

Internet Filter

Filter Anonymous Internet Requests

This option makes

it more difficult for outside users to work their way into

your network° This option is enabled by default° Disable it

to allow anonymous Internet requests

Filter Multicast

The multicasting feature allows for

multiple transmissions to specific recipients at the

same time° If multicasting is permitted, then the Router

will allow IP multicast packets to be forwarded to the

appropriate computers° Select this option to enable the

filter° This option is disabled by default°

Filter Internet NAT Redirection

This option is used to

prevent a local computer from using a URL or Internet

address to access the local server° Select this option to

enable the filter° This option is disabled by default°

Filter IDENT (Port 113)

The Filter IDENT (Identification)

option keeps port 113 from being scanned by devices

outside of your local network° This option is enabled by

default° Disable it to allow port 113 to be scanned°

Web Filter

Proxy

Use of WAN proxy servers may compromise the

Gateway’s security° Denying Proxy will disable access to

any WAN proxy servers° Select this option to enable proxy

filtering° Deselect the option to allow proxy access

Page 28 / 59

Advanced Wireless-N Router

Linksys E2000

Chapter 3: Advanced Configuration

Java

Java is a programming language for websites° If you

deny Java, you run the risk of not having access to Internet

sites created using this programming language° Select

this option to enable Java filtering° Deselect the option to

allow Java usage

ActiveX

ActiveX is a programming language for websites°

If you deny ActiveX, you run the risk of not having access to

Internet sites created using this programming language°

Select this option to enable ActiveX filtering° Deselect the

option to allow ActiveX usage

A cookie is data stored on your computer and used

by Internet sites when you interact with them° Select this option

to filter cookies° Deselect the option to allow cookie usage°

Click

Save Settings

to apply your changes, or click

Cancel

Changes

to clear your changes°

Security > VPN Passthrough

The

VPN Passthrough

screen allows you to enable VPN

tunnels using IPSec, PPTP, or L2TP protocols to pass through

the

Router

’s firewall°

Security > VPN Passthrough

VPN Passthrough

IPSec Passthrough

Internet Protocol Security (IPSec) is

a suite of protocols used to implement secure exchange

of packets at the IP layer° To allow IPSec tunnels to pass

through the Router, keep the default,

Enabled

PPTP Passthrough

Point-to-Point Tunneling Protocol

(PPTP) allows the Point-to-Point Protocol (PPP) to be

tunneled through an IP network° To allow PPTP tunnels to

pass through the Router, keep the default,

Enabled

L2TP Passthrough

Layer 2 Tunneling Protocol is the

method used to enable Point-to-Point sessions via the

Internet on the Layer 2 level° To allow L2TP tunnels to pass

through the Router, keep the default,

Enabled

Click

Save Settings

to apply your changes, or click

Cancel

Changes

to clear your changes°

Access Restrictions > Internet Access

The

Internet Access

screen allows you to block or allow

specific kinds of Internet usage and traffic, such as Internet

access, designated services, and websites during specific

days and times°

Access Restrictions > Internet Access

Internet Access Policy

Access Policy

Access can be managed by a policy° Use

the settings on this screen to establish an access policy

(after

Save Settings

is clicked)° Selecting a policy from

the drop-down menu will display that policy’s settings°

To delete a policy, select that policy’s number and click

Delete This Policy

° To view all the policies, click

Summary

The policies are listed with the following information: No°,

Policy Name, Access, Days, Time, and status (Enabled)° To

enable a policy, select

Enabled

° To delete a policy, click

Delete

° Click

Save Settings

to save your changes, or click

Cancel Changes

to clear your changes° To return to the

Internet Access Policy

screen, click

Summary

Page 29 / 59

Advanced Wireless-N Router

Linksys E2000

Chapter 3: Advanced Configuration

Status

Policies are disabled by default° To enable a policy,

select the policy number from the drop-down menu, and

select

Enabled

To create a policy, follow steps 1-11° Repeat these steps to

create additional policies, one at a time°

1° Select a number from the

Access Policy

drop-down

menu°

2°

Enter a Policy Name in the field provided°

3°

To enable this policy, select

Enabled

4° Click

Edit List

to select which computers will be affected

by the policy° The

List of PCs

screen appears° You can

select a computer by MAC address or IP address° You

can also enter a range of IP addresses if you want this

policy to affect a group of computers° After making your

changes, click

Save Settings

to apply your changes, or

click

Cancel Changes

to clear your changes° Then click

List of PCs

5° Select

the

appropriate

option,

Deny

Allow

depending on whether you want to block or allow

Internet access for the computers you listed on the

List

of PCs

screen°

6° Decide which days and what times you want this

policy to be enforced° Select the individual days during

which the policy will be in effect, or select

Everyday

Then enter a range of hours and minutes during which

the policy will be in effect, or select

24 Hours

7° You can block websites with specific URL addresses°

Enter each URL in a separate

Website Blocking by URL

Address

field°

8°

You can also block websites using specific keywords°

Enter each keyword in a separate

Keyword

field°

9°

You can filter access to various services accessed over

the Internet, such as FTP or telnet° (You can block up to

three applications per policy°)

From the Applications list, select the application you

want to block° Then click the

button to move it to

the Blocked List° To remove an application from the

Blocked List, select it and click the

button°

10° If the application you want to block is not listed or you

want to edit a service’s settings, enter the application’s

name in the

Application Name

field° Enter its range

in the

Port Range

fields° Select its protocol from the

Protocol

drop-down menu° Then click

Add

To modify a service, select it from the Application

list° Change its Application Name, Port Range, and/or

Protocol setting° Then click

Modify

To delete a service, select it from the Application list°

Then click

Delete

11° Click

Save Settings

to save the policy’s settings° To

cancel the policy’s settings, click

Cancel Changes

Applications and Gaming > Single Port

Forwarding

The

Single Port Forwarding

screen allows you to customize

port services for various applications°

When users send these types of requests to your network

via the Internet, the

Router

will forward those requests to

the appropriate computers (also called servers)° Before using

forwarding, you should assign static IP addresses to the

designated computers (use the DHCP Reservation option on

the

Basic Setup

screen; refer to

DHCP Reservation

page 19

)°

Applications and Gaming > Single Port Forwarding

Single Port Forwarding

Preset applications are available for the first five entries°

For each entry, complete the following:

Application Name

Select the appropriate application°

To IP Address

Enter the IP address of the computer that

should receive the requests° If you assigned a static IP

address to the computer, then you can look up its static IP

address; refer to

DHCP Reservation

page 19

Enabled

Select

Enabled

to enable port forwarding°

You can customize entries for additional applications° For

each entry, complete the following:

Page 30 / 59

Advanced Wireless-N Router

Linksys E2000

Chapter 3: Advanced Configuration

Application Name

Enter the name you wish to give the

application° Each name can be up to 12 characters°

External Port

Enter the external port number used by

the computer or Internet application° Check with the

Internet application documentation for more information°

Internal Port

Enter the internal port number used by the

computer or Internet application° Check with the Internet

application documentation for more information°

Protocol

Select the protocol(s) used for this application,

TCP

(Transmission Control Protocol),

UDP

(User Datagram

Protocol), or

Both

To IP Address

Enter the IP address of the computer that

should receive the requests° If you assigned a static IP

address to the computer, then you can look up its static IP

address; refer to

DHCP Reservation

page 19

Enabled

Select

Enabled

to enable port forwarding°

Click

Save Settings

to apply your changes, or click

Cancel

Changes

to clear your changes°

Applications and Gaming > Port Range

Forwarding

The

Port Range Forwarding

screen allows you to set up

public services on your network, such as web servers,

ftp servers, e-mail servers, or other specialized Internet

applications° (Specialized Internet applications are any

applications that use Internet access to perform functions

such as videoconferencing or online gaming° Some Internet

applications may not require any forwarding°)

When users send these types of requests to your network

via the Internet, the

Router

will forward those requests to

the appropriate computers (also called servers)° Before using

forwarding, you should assign static IP addresses to the

designated servers (use the DHCP Reservation option on the

Basic Setup

screen; refer to

DHCP Reservation

page 19

)°

If you need to forward all ports to one computer, click the

DMZ

tab°

Applications and Gaming > Port Range Forwarding

Port Range Forwarding

For each entry, complete the following°

Application Name

Enter the name you wish to give the

application° Each name can be up to 12 characters°

Start~End Port

Enter the number or range of port(s)

used by the server or Internet applications° Check with the

Internet application documentation for more information°

Protocol

Select the protocol(s) used for this application,

TCP

UDP

, or

Both

To IP Address

Enter the IP address of the computer

running the specific application° If you assigned a static IP

address to the computer, then you can look up its static IP

address;

refer to

DHCP Reservation

page 19

Enabled

Select

Enabled

to enable port forwarding°

Click

Save Settings

to apply your changes, or click

Cancel

Changes

to clear your changes°

Applications & Gaming > Port Range

Triggering

The

Port Range Triggering

screen allows the Router to

watch outgoing data for specific port numbers° The IP

address of the computer that sends the matching data is

remembered by the Router, so that when the requested

data returns through the Router, the data is pulled back

to the proper computer by way of IP address and port

mapping rules°

Applications and Gaming > Port Range Triggering

Port Range Triggering

For each entry, complete the following:

Application Name

Enter the application name of the

trigger°

Triggered Range

Enter the starting and ending port

numbers of the triggered port number range° Check

with the Internet application documentation for the port

number(s) needed°

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