AirLive RS-2000 - Manual (Page 156)

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How to use Virtual Server and mapped IP
Virtual Server and Mapped IP are part of the IP mapping scheme. By applying the incoming
policies, Virtual Server and IP mapping work similarly. They map real IP addresses to the
physical servers’ private IP addresses (which is opposite to NAT), but there still exists some
differences:
! Virtual Server can map one real IP to several LAN physical servers while Mapped IP
can only map one real IP to one LAN physical server (1-to-1 Mapping). The Virtual
Servers’ load balance feature can map a specific service request to different physical
servers running the same services.
! Virtual Server can only map one real IP to one service/port of the LAN physical
servers while Mapped IP maps one real IP to all the services offered by the physical
server.
IP mapping and Virtual Server work by binding the IP address of the WAN virtual server to the
private LAN IP address of the physical server that supports the services. Therefore users from
the WAN network can access servers of the LAN network by requesting the service from the
IP address provided by Virtual Server.