D-Link DI-774 Router Manual PDF (Setup & Configuration Guide)

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Advanced > Virtual Server

Using the Configuration Menu (continued)

The DI-774 can be configured as a virtual server so that remote users accessing Web

or FTP services via the public IP Address can be automatically redirected to local

servers in the LAN (Local Area Network).

The DI-774 firewall feature filters out unrecognized packets to protect your LAN

network so all computers networked with the DI-774 are invisible to the outside world.

If you wish, you can make some of the LAN computers accessible from the Internet

by enabling

Virtual Server.

Depending on the requested service, the DI-774 redirects

the external service request to the appropriate server within the LAN network.

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Advanced > Virtual Server

continued

Using the Configuration Menu (continued)

The DI-774 is also capable of port-redirection meaning incoming traffic to a particular

port may be redirected to a different port on the server computer.

Each virtual service that is created will be listed at the bottom of the screen in the

Virtual Servers List. There are pre-defined virtual services already in the table. You

may use them by enabling them and assigning the server IP to use that particular

virtual service.

Example #1:

If you have a Web server that you wanted Internet users to access at all times, you

would need to enable it. Web (HTTP) server is on LAN (Local Area Network)

computer 192.168.0.25. HTTP uses port 80, TCP.

Name: Web Server

Private IP: 192.168.0.25

Protocol Type: TCP

Private Port: 80

Public Port: 80

Schedule: always

Protocol Type-

The protocol used for the virtual service

Public Port-

The port number on the WAN (Wide Area Network)side that will

be used to access the virtual service.

Private Port-

The port number of the service used by the Private IP computer

Schedule

-

The schedule of time when the virtual service will be enabled.

The schedule may be set to

Always

, which will allow the

particular service to always be enabled. If it is set to

Time

,

select the time frame for the service to be enabled. If the

system time is outside of the scheduled time, the service will

be disabled.

Virtual Server-

Select

Enabled

or

Disabled

Name-

Enter the name referencing the virtual service

Private IP-

The server computer in the LAN (Local Area Network) that will be

providing the virtual services.

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Example #2:

If you have an FTP server that you wanted Internet users to access by WAN port

2100 and only during the weekends, you would need to enable it as such. FTP

server is on LAN computer 192.168.0.30. FTP uses port 21, TCP.

Name: FTP Server

Private IP: 192.168.0.30

Protocol Type: TCP

Private Port: 21

Public Port: 2100

Schedule: From: 01:00AM to 11:00PM, Sat to Sun

Using the Configuration Menu (continued)

Advanced > Virtual Server

continued

Click on this icon to edit the virtual service

Click on this icon to delete the virtual service

All Internet users who want to access this FTP Server

must connect to it from port 2100. This is an example of

port redirection and can be useful in cases where there

are many of the same servers on the LAN network.

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Using the Configuration Menu (continued)

Advanced > Applications

Some applications require multiple connections, such as Internet gaming, video

conferencing, Internet telephony and others. These applications have difficulties

working through NAT (Network Address Translation). Special Applications makes

some of these applications work with the DI-774. If you need to run applications that

require multiple connections, specify the port normally associated with an application

in the “Trigger Port” field, select the protocol type as TCP or UDP, then enter the

public ports associated with the trigger port to open them for inbound traffic.

The DI-774 provides some predefined applications in the table on the bottom of the

web page. Select the application you want to use and enable it.

Note!

Only one PC can use each Special Application tunnel.

Name:

This is the name referencing the special application.

Trigger Port:

This is the port used to trigger the application. It can be either

a single port or a range of ports.

Trigger Type:

This is the protocol used to trigger the special application.

Public Port:

This is the port number on the WAN side that will be used to

access the application. You may define a single port or a

range of ports. You can use a comma to add multiple ports or

port ranges.

Public Type:

This is the protocol used for the special application.

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Using the Configuration Menu (continued)

Advanced > Filters > IP Filters

Filters are used to deny or allow LAN (Local Area Network) computers from accessing

the Internet. The DI-774 can be setup to deny internal computers by their IP or MAC

addresses. The DI-774 can also block users from accessing restricted web sites.

This is the schedule of time when the IP Filter will be enabled.

Schedule-

Select the protocol type

Protocol Types-

The single port or port range that will be denied access to the

Internet.

Port-

Use IP Filters to deny LAN IP Addresses from accessing the

Internet. You can deny specific port numbers or all ports for

the specific IP Address.

IP Filters-

The IP Address of the LAN computer that will be denied

access to the Internet.

IP-

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