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M2M Cellular Gateway
Virtual Server List
"Virtual Server" feature allows you to define some servers with the global IP address or FQDN of
the gateway as if they are servers existed in the Internet. But in fact, these servers are located in the
Intranet and are physically behind the gateway. The gateway serves the service requests by port
forwarding the requests to the LAN servers and transfers the replies from LAN servers to the requester
on the WAN side. For example, if you set an E‐mail server on the LAN side with IP address 10.0.75.101,
a remote user can access the gateway for E‐mail service if you defined a virtual E‐mail server for the
gateway by using the real E‐mail server on the LAN side, as shown in scenario in following diagram.
Scenario Application Timing
Set up some application servers in the Intranet of deployed network for services and are
protected by the gateway firewall. In a way that the gateway appears to be the physical
server to the remote users, while the real server is, in reality, operating and providing
service at the LAN side behind the gateway.
Scenario Description
The gateway serves as an E‐mail server for remote users E‐mail services from the
gateway.
Index skipping is used to reserve slots for new function insertion, when required.
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