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D-L±nk DIR-855 User Manual

Sect±on ´ - Configurat±on

Add Website

Filtering Rule:

Website URL/

Domain:

Website Filters

Select

Allow

or

Deny

.

Enter the keywords or URLs that you want to

allow or block. Click

Save Settings

.

Website Filters are used to allow you to set up a list of allowed Web sites that can be used by multiple users through

the network. To use this feature select to

Allow

or

Deny

, enter the domain or website and click

Save Settings

. You

must also select

Apply Web Filter

under the

Access Control

section (page 39).

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D-L±nk DIR-855 User Manual

Sect±on ´ - Configurat±on

Enter a name for the inbound filter rule.

Select

Allow

or

Deny

.

Check to enable rule.

Enter the starting IP address. Enter 0.0.0.0

if you do not want to specify an IP range.

Enter the ending IP address. Enter

255.255.255.255 if you do not want to

specify and IP range.

Click the

Add

button to apply your settings.

You must click

Save Settings

at the top to

save the settings.

This section will list any rules that are created.

You may click the

Edit

icon to change the

settings or enable/disable the rule, or click

the

Delete

icon to remove the rule.

Name:

Action:

Enable:

Remote IP Start:

Remote IP End:

Add:

Inbound Filter

Rules List:

The Inbound Filter 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

with Virtual Server, Port Forwarding, or Remote Administration features.

Inbound Filters

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D-L±nk DIR-855 User Manual

Sect±on ´ - Configurat±on

SPI (Stateful Packet Inspection, also known as dynamic packet

filtering) helps to prevent cyber attacks by tracking more state per

session. It validates that the traffic passing through the session

conforms to the protocol.

Select one of the following for TCP and UDP ports:

Endpoint Independent

- Any incoming traffic sent to an open port

will be forwarded to the application that opened the port. The port

will close if idle for 5 minutes.

Address Restricted

- Incoming traffic must match the IP address

of the outgoing connection.

Address + Port Restriction

- Incoming traffic must match the IP

address and port of the outgoing connection.

Enable this feature to protect your network from certain kinds of

“spoofing” attacks.

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.

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 static reservation on the

Basic

>

DHCP

page so that the IP address of the DMZ machine does not change.

Enable SPI:

NAT Endpoint

Filtering:

Anti-Spoof Check:

Enable DMZ:

DMZ IP Address:

Firewall Settings

A firewall protects your network from the outside world. The DIR-855 offers a firewall type functionality. The SPI feature

helps prevent cyber attacks. Sometimes you may want a computer exposed to the outside world for certain types of

applications. If you choose to expose a computer, you can enable DMZ. DMZ is short for Demilitarized Zone. This

option will expose the chosen computer completely to the outside world.

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D-L±nk DIR-855 User Manual

Sect±on ´ - Configurat±on

Application Level Gateway (ALG) Configuration

Here you can enable or disable ALG’s. 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.

Allows multiple machines on the LAN to connect to their corporate network using PPTP protocol.

Allows multiple VPN clients to connect to their corporate network using IPSec. Some VPN clients support traversal of IPSec

through NAT. This ALG may interfere with the operation of such VPN clients. If you are having trouble connecting with your

corporate network, try turning this ALG off. Please check with the system administrator of your corporate network whether

your VPN client supports NAT traversal.

Allows application that uses Real Time Streaming Protocol to receive streaming media from the Internet. QuickTime and

Real Player are some of the common applications using this protocol.

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.

PPTP:

IPSEC (VPN):

RTSP:

SIP:

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D-L±nk DIR-855 User Manual

Sect±on ´ - Configurat±on

Enter the IP address of packets that will take

this route.

Enter the netmask of the route, please note

that the octets must match your destination

IP address.

Enter your next hop gateway to be taken if this

route is used.

The route metric is a value from 1 to 16 that

indicates the cost of using this route. A value 1

is the lowest cost and 15 is the highest cost.

Select the interface that the IP packet must

use to transit out of the router when this route

is used.

Destination IP:

Netmask:

Gateway:

Metric:

Interface:

Routing

The Routing option is an advanced method of customizing specific routes of data through your network.