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Virtual Server
The Multi-Homing Gateway separates an enterprise‟s Intranet and Internet into LAN networks
and WAN 1/2 networks respectively. 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 Multi-Homing Gateway Gateway‟s NAT (Network
Address Translation) function. If a server which provides service to the WAN 1/2 networks,
is located in the LAN networks, outside users can‟t directly connect to the server by using the
server‟s private IP address.
The Multi-Homing Gateway Gateway‟s Virtual Server can solve this problem. A virtual server
has set the real IP address of the Multi-Homing Gateway Gateway‟s WAN 1/2 network
interface to be the Virtual Server IP. Through the virtual server feature, the Multi-Homing
Gateway translates the virtual server‟s IP address into the private IP address of physical
server in the LAN network. When outside users on the Internet request connections to the
virtual server, the request will be forwarded to the private LAN server.
Virtual Server owns another feature know as one-to-many mapping. This is when one virtual
server IP address on the WAN 1/2 interface can be mapped into LAN network server 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 sending
all data packets to all similar servers, this increases the server‟s efficiency, reduces risks of
server crashes, and enhances servers‟ stability.
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