4.4 Advanced Setup

4.4.1 Firewall

User can enable or disable firewall feature of the ENDSL-A2+4R router in the page.

4.4.2 Routing

This table lists IP address of Internet destinations commonly accessed by your network.

When a computer requests to send data to a listed destination, the device uses the Gateway

IP to identify the first Internet router it should contact to route the data most efficiently. Select

this option will list the routing table information. You can press

ADD ROUTE

to edit the static

route.

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[Static Route]

Select this option to set Static Routing information.

Destination IP Address:

This parameter specifies the IP network address of the final

destination.

IP Subnet Mask:

Enter the subnet mask for this destination.

Gateway IP Address:

Enter the IP address of the gateway. The gateway is an immediate

neighbor of your ADSL Router that will forward the packet to the destination. On the LAN, the

gateway must be a router on the same segment as your Router; over Internet (WAN), the

gateway must be the IP address of one of the remote nodes.

Metric:

Metric represents the “cost” of transmission for routing purposes. IP Routing uses hop

count as the measurement of cost, with a minimum of 1 for directly connected networks. Enter

a number that approximates the cost for this link. The number need not to be precise, but it

must between 1 and 15. In practice, 2 or 3 is usually a good number.

Announced in RIP:

This parameter determines if the ENDSL-A2+4R router includes the

router to this remote node in its RIP broadcasts. If you choose

Yes

, the router in this remote

node will be propagated to other hosts through RIP broadcasts. If No, this route is kept private

and is not included in RIP broadcasts.

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4.4.3 NAT

Network Address Translation (NAT)

is a method for disguising the private IP addresses you

use on your LAN as the public IP address you use on the Internet. You define NAT rules that

specify exactly how and when to translate between public and private IP addresses. Simply

select this option to setup the NAT function for your ADSL router.

Virtual Circuit (VC):

The Virtual Circuit (VC) properties of the ATM VC interface identify a

unique path that your ADSL/Ethernet router uses to communicate via the ATM-based network

with the telephone company central office equipment.

NAT Status:

This filed shows the current status of the NAT function for the current VC.

Number of IPs:

This field is to specify how many IPs are provided by your ISP for current VC.

It can be single IP or multiple IPs.

Note:

For VCs with single IP, they share the same DMZ & Virtual servers; for VCs with multiple

IPs, each VC cab set DMZ and Virtual servers. Furthermore, for VCs with multiple IPs, they

can define the Address Mapping rules; for VCs with single IP, since they have only one IP,

there is no need to individually define the Address Mapping rule.

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[DMZ]

A

DMZ

(de-militarized zone) is a host between a private local network and the outside public

network. It prevents outside users from getting direct access to s server that has company

data. Users of the public network outside the company can access only the DMZ host.

DMZ Host IP Address:

Enter the specified IP Address for DMZ host on the LAN side

[Virtual Server]

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The Virtual Server is the server or server(s) behind NAT (on the LAN), for example, Web

server or FTP server, that you can make visible to the outside world even though NAT makes

your whole inside network appear as a single machine to the outside world.

Rule Index:

The Virtual server rule index for this VC. You can specify up to 10 rules. All the

VCs with single IP will use the same Virtual Server rules.

Start & End port number:

Enter the specific Start and End Port number you want to forward.

If it is one port only, you can enter the End port number the same as Start port number. For

example, set the FTP Virtual server, you can set the start and end port number to 21.

Local IP Address:

Enter the IP Address for the Virtual Server in LAN side.

[IP Address Mapping]

The IP Address Mapping is for those VCs that with multiple IPs. The IP Address Mapping rule

is per-VC based. (only for Multiple IPs’ VCs).

Rule Index:

The Virtual server rule index for this VC. You can specify up to 10 rules. All the

VCs with single IP will use the same Virtual Server rules.

Rule Type:

There are 4 types of

One-to-One

,

Many-to-One, Many-to-Many Overload

, and

Many-to Many No-Overload

.

Local Start & End IP:

Enter the local IP address you plan to map to. Local Start IP is the

starting local IP address & Local End IP is the ending local IP address. If the rule is for all local

IPs, then the Start IP is 0.0.0.0 and the End IP is 255.255.255.255.

Public Start & End IP:

Enter the Public IP Address you want to do NAT. Public Start IP is the

starting Public IP Address and Public End IP is the ending Public IP Address. If you have a

Dynamic IP, enter 0.0.0.0 as the Public Start IP.

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