Billion BiPAC 7800DXL Router Manual PDF (Setup & Configuration Guide)

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167

Open port



Start:

Enter a port number as the open port staring number.



End:

Enter a port number as the open port ending number.

Any port in the range delimited by the ‘Start’ and ‘End’ would be the preset forwarding port or open

port.

Protocol:

select the protocol this service used: TCP/UDP, TCP, UDP.

Set up

An example of how port triggering works, when a client behind a NAT router connecting to Aim Talk,

it is a TCP connection with the default port 4099.

When connecting to Aim Talk, the client typically makes an outgoing connection on port 4099 to the

Aim Talk server, but when the computer is behind the NAT, the NAT silently drops this connection

because it does not know which computer behind the NAT to send the request to connect.

So, in this case, port triggering in the router is working, when an outbound connection is attempted

on port 4099 (or any port in the range set), it should allow inbound connections to that particular

computer.

1.

Select a Server Name from the drop-down menu, then the port will automatically appear, modify

some as you like, or you can just leave it as default. Remember to enter your server IP Address.

2.

Press

Apply

to conform, and the items will be list in the

Virtual Servers Setup

table.

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168

Remove

If you don’t need a specified Server, you can remove it. Check the check box beside the item you

want to remove, and then press

Remove

.

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169

DMZ Host

The DMZ Host is a local computer exposed to the Internet. When setting a particular internal IP

address as the DMZ Host, all incoming packets will be checked by Firewall and NAT algorithms

before being passed to the DMZ host, when a packet received does not use a port number used by

any other Virtual Server entries.

DMZ Host IP Address:

Enter the IP Address of a host you want it to be a DMZ host. Select from the

list box to quick set the DMZ.

Time Schedule:

Select or set exactly when the DMZ works. When set to “Always On”, the DMZ will

work all time; and also you can set the precise time when DMZ works, like 01:00 of Sun to 19:00 of

Friday. Or you can select the already set timeslot in

Time Schedule

during which the DMZ works.

And when set to “Disable”, the rule is disabled. See

Time Schedule

.

Using port mapping does have security implications, since outside users are able to connect

to PCs on your network. For this reason you are advised to use specific Virtual Server

entries just for the ports your application requires instead of simply using DMZ or creating a

Virtual Server entry for “All” protocols, as doing so results in all connection attempts to your

public IP address accessing the specified PC.

Attention

If you have disabled the NAT option in the WAN-ISP section, the Virtual Server function will

hence be invalid.

If the DHCP server option is enabled, you have to be very careful in assigning the IP

addresses of the virtual servers in order to avoid conflicts. The easiest way of configuring

Virtual Servers is to manually assign static IP address to each virtual server PC, with an

address that does not fall into the range of IP addresses that are to be issued by the DHCP

server. You can configure the virtual server IP address manually, but it must still be in the

same subnet as the router.

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170

One-to-One NAT

One-to-One NAT maps a specific private/local address to a global/public IP address. If user has

multiple global/public IP addresses from your ISP, you are free to use one-to-one NAT to assign

some specific public IP for an internal IP like a public web server mapped with a global/public IP for

outside access.

Valid:

Check whether to valid the one-to-one NAT mapping rule.

WAN Interface:

Select one based WAN interface to configure the one-to-one NAT.

Global IP address:

The Global IP mapped to an internal device. It can be left empty, and under this

circumstance, it can be reached through the WAN IP of interface set in the field above.

Internal Address:

The IP address of an internal device in the LAN.

For example,

you have an ADSL connection of pppoe_0_8_35/ppp0.1 interface with three fixed

global IP, and you then can assign the other two global IPs to two internal devices respectively.

If you have a WEB server (IP address: 192.168.1.3) and a FTP server (IP address: 192.168.1.4) in

local network, owning a public IP address range of 123.1.1.2 to 123.1.1.4 assigned by ISP. 123.1.1.2

is used as WAN IP address of the router, 123.1.1.3 is used for WEB server and 123.1.1.4 is used for

FTP server. With One-to-One NAT, the servers with private IP addresses can be accessed at the

corresponding valid public IP addresses.

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171

Wake On LAN

Wake on LAN (WOL, sometimes WoL) is an Ethernet computer networking standard that allows a

computer to be turned on or woken up remotely by a network message.

Host Label:

Enter identification for the host.

Select:

Select MAC address of the computer that you want to wake up or turn on remotely.

Add:

After selecting, click Add then you can perform the Wake-up action.

Edit/Delete:

Click to edit or delete the selected MAC address.

Ready:

“Yes”

indicating the remote computer is ready for your waking up.

“No”

indicating the machine is not ready for your waking up.

Delete:

Delete the selected MAC address.

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