4GMini/4GPlus Cellular Modem
12
FIGURE 7-3. Serial – RS-232
7.6 Firewall
The firewall controls incoming and outgoing traffic through the modem, based
on user-created rules. The firewall must be configured in order to communicate
with the datalogger. Additionally, the firewall helps prevent unauthorized
access of data useage. The following setup can be used with all service
providers.
7.6.1 Firewall Rules (TCP Server)
This section does not apply to PPP or Ethernet connections or
devices.
The following steps for setting up the firewall assume a RS-232 or CS I/O
connection to the modem’s RS-232 port, when using the modem’s TCP serial
server mode.
1. Navigate to the
General
tab under the
Firewall
section.
2. Ensure
Carrier Remote Management
is Enabled. The allows remote
configuration of the modem, if required.
3. Set
Carrier
request to
Block
.
4. Click
Submit
to save changes.
With the firewall enabled, it is possible to define specific traffic that will be
allowed by configuring the destination port:
1. Navigate to the
Rules
tab.
Note
