EW50 Industrial LTE Cellular Gateway
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assigned a virtual IP (10.8.0.2) which belongs to a virtual subnet that is different to the local subnet in Control
Center. With such a 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; 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" refers 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 resources on the LAN.
To offer remote access to the entire remote LAN for VPN
client(s), set up 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 on the same subnet
as that of local subnet in Control Center. With this
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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General