Chapter 13 virtual server – AirLive RS-3000 User Manual
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The real IP address provided from ISP is always not enough for all the users when the system manager
applies the network connection from ISP. Generally speaking, in order to allocate enough IP addresses
for all computers, an enterprise assigns each computer a private IP address, and converts it into a real
IP address through RS-3000’s NAT (Network Address Translation) function. If a server that provides
service to WAN network is located in LAN networks, external users cannot directly connect to the server
by using the server’s private IP address.
The RS-3000’s Virtual Server function can solve this problem. A Virtual Server has set the real IP
address of the RS-3000’s WAN network interface to be the Virtual Server IP. Through the Virtual Server
function, the RS-3000 translates the Virtual Server’s IP address into the private IP address in the LAN
network.
Virtual Server owns another feature know as one-to-many mapping. This is when one real server IP
address on the WAN interface can be mapped into four LAN network servers provide the same service
private IP addresses. This option is useful for Load Balancing, which causes the Virtual Server to
distribute data packets to each private IP addresses (which are the real servers) by session. Therefore,
it can reduce the loading of a single server and lower the crash risk. And can improve the work
efficiency.
In this chapter, we will have detailed introduction and instruction of
Mapped IP
and
Server 1/2/3/4
:
Mapped IP
: Because the Intranet is transferring the private IP by NAT Mode (Network Address
Translation). And if the server is in LAN, its IP Address is belonging to Private IP Address. Then the
external users cannot connect to its private IP Address directly. The user must connect to the RS-3000’s
WAN subnet’s Real IP and then map Real IP to Private IP of LAN by the RS-3000. It is a one-to-one
mapping. That is, to map all the service of one WAN Real IP Address to one LAN Private IP Address.
Server 1/2/3/4
: Its function resembles Mapped IP’s. But the Virtual Server maps one to many. That is, to
map a Real IP Address to 1~4 LAN Private IP Address and provide the service item in Service.
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