User manual
set passthrough
Chapter 2 Command Descriptions 153
set passthrough
Devices
supported
This command is supported in Digi Cellular Family products only.
Purpose Configures the IP pass-through feature. IP pass-through allows a Digi
Cellular Family device to provide bridging functionality similar to a cable or
DSL modem, where the Digi Cellular Family device becomes “transparent”
to the router or connected device. In this case, the router’s WAN interface
believes it is connected directly to the mobile network, and has no
knowledge that the Digi Cellular Family device is the mechanism providing
that connectivity.
A Digi Cellular Family device configured for IP pass-through, such as a
ConnectPort WAN or Digi Connect WAN, passes its mobile IP address
directly through and to the Ethernet device (router or PC) to which it is
connected through the Ethernet port. From the perspective of the
connected device, the Digi Cellular Family device essentially becomes
transparent (similar to the behavior of a cable or DSL modem) to provide a
bridge from the mobile network directly to the end device attached to the
Digi Cellular Family device.
Since the mobile network address is effectively “passed-through” to the
local device connected to the Ethernet port of the Digi Cellular Family
device, all network access to it is bypassed, with some specific exceptions.
Services disabled when IP pass-through is enabled
When IP pass-through is enabled, the Digi Cellular Family device
effectively disables all router and IP service functionality. Services that are
disabled are:
•NAT
• Port Forwarding
•VPN
• DDNS updates
• Socket Tunnel
• Network Services configuration
Services available when IP pass-through is enabled
The Digi Cellular Family device is effectively transparent to all IP activity
and network access by other devices, with these exceptions:
• It can be accessed via the serial port for configuration using the
command line interface.
• It accepts TCP/IP connections for purposes of configuration by means
of a “pinhole” on the mobile interface.
• It can be accessed by other devices on the local Ethernet segment via
the default IP address of 192.168.1.1.
• Clients such as SureLink, and client/server services such as
Connectware Manager are operational and enabled by default.