Ping-Communication RGW208EN Router Manual PDF (Setup & Configuration Guide)

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Enable DMZ:

If an application has trouble working from behind the router, you can

expose one computer to the Internet and run the application on that computer.

Note: Placing a computer in the DMZ may expose that computer to a variety of

security risks. Use of this option is only recommended as a last resort.

DMZ IP Address:

Specify the IP address of the computer on the LAN that you want

to have unrestricted Internet communication. If this computer obtains it’s IP address

automatically using

DHCP

, be sure to make a

DHCP reservation

on the

Basic ->

DHCP

page so that the IP address of the

DMZ machine

does not change.

After you’ve completed all modifications or deletions, you must click the

Save

Settings

button at the top of the page to save your changes. The router must reboot

before new settings will take effect. You will be prompted to

Reboot the Device

or

Continue

. If you need to make additional settings changes, click

Continue

. If you are

finished with your configuration settings, click the

Reboot the Device

button.

3.9.5

Non-UDP/ TCP/ IMCP LAN Sessions

When a LAN application that uses a protocol other than UDP, TCP, or ICMP initiates a

session to the Internet, the router's NAT can track such a session, even though it

does not recognize the protocol. This feature is useful because it enables certain

applications (most importantly a single VPN connection to a remote host) without the

need for an

Application Layer Gateway

.

Note that this feature does not apply to the DMZ host (if one is enabled). The DMZ

host always handles these kinds of sessions

.

Enable:

Enabling this option enables single VPN connections to a remote host. (But,

for multiple VPN connections, the appropriate VPN ALG must be used.) Disabling this

option, however, only disables VPN if the appropriate VPN ALG is also disabled.

3.9.6

Application Level Gateway (ALG) Configuration

Here you can enable or disable ALGs. Some protocols and applications require special

handling of the IP payload to make them work with network address translation

(NAT). Each ALG provides special handling for a specific protocol or application. A

number of ALGs for common applications are enabled by default.

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PPTP:

Allows multiple machines on the LAN to connect to their corporate networks

using PPTP protocol. When the PPTP ALG is enabled, LAN computers can establish

PPTP VPN connections either with the same or with different VPN servers. When the

PPTP ALG is disabled, the router allows VPN operation in a restricted way -- LAN

computers are typically able to establish VPN tunnels to different VPN Internet

servers but not to the same server.

IPSec (VPN):

Allows multiple VPN clients to connect to their corporate networks

using IPSec. Some VPN clients support traversal of IPSec through NAT. This option

may interfere with the operation of such VPN clients. If you are having trouble

connecting with your corporate network, try disabling this option.

Check with the system administrator of your corporate network whether your VPN

client supports NAT traversal.

Note that L2TP VPN connections typically use IPSec to secure the connection. To

achieve multiple VPN pass-through in this case, the IPSec ALG must be enabled.

RTSP:

Allows applications that use Real Time Streaming Protocol to receive

streaming media from the Internet. QuickTime and Real Player are some of the

common applications using this protocol.

Windows/ MSN Messenger:

Supports use on LAN computers of Microsoft Windows

Messenger (the Internet messaging client that ships with Microsoft Windows) and

MSN Messenger. The SIP ALG must also be enabled when the Windows Messenger

ALG is enabled.

FTP:

Allows FTP clients and servers to transfer data across NAT. Refer to the

Advanced -> Virtual Server page if you want to host an FTP server.

H.323 (NetMeeting):

Allows H.323 (specifically Microsoft Netmeeting) clients to

communicate across NAT. Note that if you want your buddies to call you, you should

also set up a virtual server for NetMeeting. Refer to the Advanced

Virtual Server

→

page for information on how to set up a virtual server.

SIP:

Allows devices and applications using VoIP (Voice over IP) to communicate

across NAT. Some VoIP applications and devices have the ability to discover NAT

devices and work around them. This ALG may interfere with the operation of such

devices. If you are having trouble making VoIP calls, try turning this ALG off.

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Wake-On-LAN:

This feature enables forwarding of "magic packets" (that is,

specially formatted wake-up packets) from the WAN to a LAN computer or other

device that is "Wake on LAN" (WOL) capable. The WOL device must be defined as

such on the Advanced

Virtual Server page. The LAN IP address for the virtual

→

server is typically set to the broadcast address 192.168.0.255. The computer on the

LAN whose MAC address is contained in the magic packet will be awakened.

MMS:

Allows Windows Media Player, using MMS protocol, to receive streaming media

from the Internet.

3.10

Inbound filter

The Inbound Filters option is an advanced method of controlling data received from

the Internet. With this feature you can configure inbound data filtering rules that

control data based on an IP address range.

Inbound Filters can be used for limiting access to a server on your network to a

system or group of systems. Filter rules can be used with Virtual Server, Gaming, or

Remote Administration features.

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3.10.1

Add/Edit Inbound Filter Rule

Here you can add entries to the

Inbound Filter Rules List

below, or edit existing

entries.

Name:

. Enter a name for the rule that is meaningful to you.

Action:

The rule can either

Allow

or

Deny

messages.

Remote IP Range:

Define the ranges of Internet addresses this rule applies to. For

a single IP address, enter the same address in both the

Start

and

End

boxes. Up to

eight ranges can be entered. The

Enable

checkbox allows you to turn on or off

specific entries in the list of ranges.

Save:

Saves the new rule or modified existing rule to the Rules list. When you are

done editing the settings, you must click the

Save Settings

button at the top of the

page to make the changes effective and permanent.

3.10.2

Inbound Filter Rules List

The section lists the current

Inbound Filter Rules

. An

Inbound Filter Rule

can be

changed by clicking the

Edit

icon, or deleted by clicking the

Delete

icon. When you

click the

Edit

icon, the item is highlighted, and the "

Edit Inbound Filter Rule

" section

is activated for editing. After you’ve completed all modifications or deletions, you

must click the

Save Settings

button at the top of the page to save your changes. The

router must reboot before new settings will take effect. You will be prompted to

Reboot the Device

or

Continue

. If you need to make additional settings changes,

click

Continue

. If you are finished with your configuration settings, click the

Reboot

the Device

button.

In addition to the filters listed here, two predefined filters are available wherever

inbound filters can be applied:

Allow All:

Permit any WAN user to access the related capability.

Deny All:

Prevent all WAN users from accessing the related capability. (LAN users

are not affected by Inbound Filter Rules..

3.11

Advanced Wireless

Transmit Power:

Normally the wireless transmitter operates at 100% power. In some

circumstances, however, there might be a need to isolate specific frequencies to a smaller

area. By reducing the power of the radio, you can prevent transmissions from reaching

beyond your corporate/home office or designated wireless area.

Beacon Period:

Beacons are packets sent by a wireless router to synchronize wireless

devices. Specify a Beacon Period value between 20 and 1000. The default value is set to

100 milliseconds. Values that are not a multiple of 4, are forced to a multiple of 4.

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RTS Threshold:

When an excessive number of wireless packet collisions are occurring,

wireless performance can be improved by using the RTS/CTS (Request to Send/Clear to

Send) handshake protocol. The wireless transmitter will begin to send RTS frames (and

wait for CTS) when data frame size in bytes is greater than the RTS Threshold. This

setting should remain at its default value of 2346 bytes.

Fragmentation Threshold:

Wireless frames can be divided into smaller units

(fragments) to improve performance in the presence of RF interference and at the limits

of RF coverage. Fragmentation will occur when frame size in bytes is greater than the

Fragmentation Threshold. This setting should remain at its default value of 2346 bytes.

Setting the Fragmentation value too low may result in poor performance.

DTIM Interval:

A DTIM is a countdown informing clients of the next window for

listening to broadcast and multicast messages. When the wireless router has buffered

broadcast or multicast messages for associated clients, it sends the next DTIM with a

DTIM Interval value. Wireless clients detect the beacons and awaken to receive the

broadcast and multicast messages. The default value is 1. Valid settings are between 1

and 255.

802.11d Enable:

Enables 802.11d operation. 802.11d is a wireless specification for

operation in additional regulatory domains. This supplement to the 802.11 specifications

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