Linksys WRTP54G-ER Router Manual PDF (Setup & Configuration Guide)

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33

Chapter 5: Configuring the Router

The Security Tab - Firewall

When you click the Security tab, you will see the

Firewall

screen. You can use this screen to enable a variety of

web filters, which will enhance the firewall protecting your network.

Web Filters

Filter Proxy

. Use of WAN proxy servers may compromise the Gateway's security. Denying Filter Proxy will

disable access to any WAN proxy servers. To enable proxy filtering, click the checkbox.

Filter Java Applets

. Java is a programming language for websites. If you deny Java Applets, you run the risk of

not having access to Internet sites created using this programming language. To enable Java Applet filtering,

click the checkbox.

Filter Pop-Ups

. When you use the Internet, sometimes unwanted pop-up screens may appear on your screen.

To enable pop-up filtering, click the checkbox.

Filter Cookies

. A cookie is data stored on your computer and used by Internet sites when you interact with

them. To enable cookie filtering, click the checkbox.

Filter 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. To enable ActiveX filtering, click the

checkbox.

When you have finished making changes on this screen, click the

Save Settings

button to save the changes, or

click the

Cancel Changes

button to undo your changes.

Figure 5-20: Security Tab - Firewall

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Chapter 5: Configuring the Router

The Security Tab - VPN Passthrough

Use the settings on this tab to allow VPN tunnels using IPSec, PPPoE, or PPTP protocols to pass through the

Router’s firewall.

IPSec Pass-through

. 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, click

Enable

.

IPSec

Pass-Through is enabled by default.

PPPoE Pass-through

. Point-to-Point over Ethernet (PPoE) allows your PCs to use the PPPoE client software

provide by your ISP. Some ISPs may request that you use this feature on th Router. To allow PPPoE tunnels to

pass through the Router, click

Enable

. PPPoE Pass-Through is enabled by default.

PPTP Pass-through

. 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, click

Enable

. PPTP Pass-

Through is enabled by default.

Change these settings as described here and click the

Save Settings

button to apply your changes or

Cancel

Changes

to cancel your changes.

Figure 5-21: Security Tab - VPN

Passthrough

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Chapter 5: Configuring the Router

The Access Restrictions Tab - Filter

Filters can block specific internal users from accessing the Internet, anonymous Internet requests, and/or

multicasting.

Filter IP Address Range

You can create up to five different IP Address filters. To set up a filter, enter the IP address you wish to filter in

the field provided. Users who have filtered IP addresses will not be able to access the Internet at all.

Filter Port Range

You can create up to five different Port Range filters. To filter users by network port number, select the protocol

you want to filter,

TCP

,

UDP

, or

Both

, from the

Protocol

drop-down menu. Enter the port numbers you want to

filter in the

Start

and

End

fields. Users connected to the Router will no longer be able to access any port number

listed there.

Filter MAC Address

This feature blocks computers with specific MAC addresses from going out to the Internet. For information on

obtaining a MAC address, go to “Appendix C: Finding the MAC Address and IP Address for Your Ethernet

Adapter.” To set the MAC filter, click the

Edit MAC Filter Setting

button.

Edit MAC Filter Setting

. Click the

Edit MAC Filter Setting

button. Select the range of MAC address entries in

the drop-down box. In each

mac

field, enter the MAC address you want to filter.

Click the

Apply

button before

closing the window. To cancel changes, click the

Undo

button.

Figure 5-22: Access Restrictions Tab -

Filter

Figure 5-23: Filtered MAC Address

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Chapter 5: Configuring the Router

The Access Restrictions Tab - Filter

Block WAN Requests

Use these features to enhance your network’s security and filter multicasting.

Block Anonymous Internet Requests

. This keeps your network from being “pinged” or detected and

reinforces your network security by hiding your network ports, so it is more difficult for intruders to work their

way into your network. Select

Enabled

to block anonymous Internet requests, or

Disabled

to allow anonymous

Internet requests.

Filter Multicast

. Multicasting 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

Enabled

to filter multicasting, or

Disabled

to disable this feature.

When you have finished making changes to this screen, click the

Save Settings

button to save the changes, or

click the

Cancel Changes

button to undo your changes.

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Chapter 5: Configuring the Router

The Applications & Gaming Tab - Port Range Forwarding

When you click the Applications & Gaming tab, you will see the

Port Range Forwarding

screen. Port Range

Forwarding sets 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 this type of request to your network via the Internet, the Router will

forward those requests to the appropriate PC.

Before using forwarding, you should assign a static IP address to the designated PC.

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

DMZ

tab.

Port Range Forwarding

Port Range

To add a server using Port Range Forwarding, complete the following fields:

Application

. Enter the name of the application.

Start and End

. Enter the number or range of external port(s) used by the server or Internet application. Check

with the Internet application software documentation for more information.

Protocol

. Select the protocol

TCP

or

UDP

, or select

Both

.

IP Address

. Enter the IP address of the server that you want the Internet users to be able to access. To find the

IP address, go to “Appendix C: Finding the MAC Address and IP Address for Your Ethernet Adapter.”

Figure 5-24: Applications & Gaming Tab -

Port Range Forwarding

ip

(internet protocol): a protocol used to

send data over a network.

ip address

: the address used to identify a

computer or device on a network.

tcp

: a network protocol for transmitting

data that requires acknowledgement from

the recipient of data sent.

udp

: a network protocol for transmitting

data that does not require

acknowledgement from the recipient of

the data that is sent.

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