Industry Cellular Gateway
assigned a virtual IP (10.8.0.2) which is belong to a virtual subnet that is different to the local subnet in Control
Center. With such connection, the local networked devices will get a virtual IP 10.8.0.x if its traffic goes
through the OpenVPN TUN connection when Redirect Internet Traffic settings is enabled; Besides, the SCADA
Server in Control Center can access remote attached serial device(s) with the virtual IP address (10.8.0.2).
OpenVPN TAP Scenario
The term "TAP" is referred to bridge mode and operates
with layer 2 packets. In bridge mode, the VPN client is
given an IP address on the same subnet as the LAN
resided under the OpenVPN server. Under such
configuration, the OpenVPN client can directly access to
the resources in LAN. If you want to offer remote access
to the entire remote LAN for VPN client(s), you have to
setup OpenVPN in “TAP” bridge mode.
As shown in the diagram, the M2M-IoT Gateway is
configured as an OpenVPN TAP Client, and connects to an
OpenVPN TAP Server. Once the OpenVPN TAP connection
is established, the connected TAP client will be assigned a
virtual IP (192.168.100.210) which is the same subnet as
that of local subnet in Control Center. With such connection, the SCADA Server in Control Center can access
remote attached serial device(s) with the virtual IP address (192.168.100.210).
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