Digi Connect IT 4 User Manual page 43

Configure Connect IT using the web user interface
3. Expand the Modem section.
4. Expand the Passthrough section.
5. Configure the settings.
Setting
Enable
Device
Zone
Packet filtering
Allow all addresses
Ancillary addressing
Ancillary address/netmask
Digi Connect IT® 4 User Guide
Configure the modem in the Connect IT
Description
Select Enable to enable IP passthrough for this
network interface.
The network device that the external device is
connected to. The address from the cellular network
will be assigned to the external device via DHCP,
rather than being assigned to the modem device in
this unit.
Options are: Loopback, LAN, or WAN.
The firewall zone assigned to the passthrough
network interface. This can be used by packet
filtering rules and access control lists to restrict
network traffic on the passthrough interface.
Options are: Any, Loopback, Internal, External,
Setup, IPsec, Dynamic routes.
Enable firewall packet filtering rules for the
passthrough network traffic.
If this setting is disabled, then network traffic is
allowed in both directions, and it is the responsibility
of the external device to provide its own firewall.
Enable forwarding between the cellular network and
any network/address connected using the
passthrough device. This allows connected devices to
forward and receive packets without NAT.
Disable this option unless specifically required, as
some cellular networks will disconnect modems that
send packets that are not from the carrier-assigned
IP address(es).
When enabled, the ancillary address and gateway will
be provided to the connected client while the
passthrough modem is not connected.
When the passthrough modem is not connected, the
ancillary address/netmask will be provided to clients
to allow functional local networking.
Syntax: IPv4_address/netmask
Default: 10.0.0.2/24
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