modbussecure n

Secure access to the modem's MODBUS server from the Internet.
If enabled, it will not be possible to remotely access the MODBUS server via the port specified in modbusport and using the current IP address allocated to the CTM-200 by the network.
This is to support applications where the servers may be accessed through SSH tunneling.

n = 0	Allow direct access to MODBUS server from Internet (default)
n = 1	Secure - do not allow direct access to MODBUS server from Internet

Examples:

Set the CTM-200 to secure access to MODBUS server from Internet :
cmd modbussecure 1