D-Link DFL-100 Инструкция по эксплуатации онлайн [30/97] 17499

NAT

Network Address Translation

Note: NAT is automatically applied between the WAN and the LAN sides of

the DFL-100. It does not require any user configuration.

Network Address Translation (NAT) is a routing protocol that allows your

network to become a private network that is isolated from, yet connected to

the Internet. It does this by changing the IP address of packets from a global

IP address usable on the Internet to a local IP address usable on your private

network (but not on the Internet) and vice-versa. The DFL-100 VPN Router

allows up to 128 host IP addresses.

NAT has two major benefits. First, NAT allows many users to access the

Internet using a single global IP address. This can greatly reduce the costs

associated with Internet access and helps alleviate the current shortage of

Internet IP addresses. Secondly, the NAT process creates an added degree of

security by hiding your private network behind one IP address. The NAT

function will normally only allow incoming packets that are generated in

response to a request from a host within the LAN.

NAT is automatically applied between the IP addresses assigned to the DFL-

100’s WAN port (the IP address or addresses assigned to you by your ISP)

and the IP addresses assigned to the DFL-100’s LAN ports (the 192.168.0.x

subnet). NAT is not used between the WAN port and the DMZ port.

Complications with Using NAT and Some Applications

NAT is a simple IP address mapping function (that is, it only looks at IP

address headers) and is therefore unaware of the application data embedded

in packets that pass through it. Computers on your LAN running applications

that may conflict with NAT can be connected to the DFL-100’s DMZ port.

NAT is not applied to the DMZ port.