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ET-485
NOVATEK-ELECTRO
4.
Protection of connection
ET-485 has basic protection against unauthorized access over Ethernet.
IP-address filter for configuration can be enabled to restrict access to HTTP and Modbus interfaces of the unit to a single specified address,
without restricting access to the Modbus (RS-485);
IP-address filter for Modbus TCP can be enabled to restrict access via Modbus TCP to the Modbus network (RS- 485) and unit to a single
specified address;
unit settings can be changed remotely by entering the password (minimum 5 characters). Entering several incorrect passwords while trying
to determine the correct one is blocked by the unit.
when entering the password, all settings shall be only available to a given client using a given protocol. In case of no requests from the
client over the long period, the access returns to locked mode.
Note: The setup mode is provided over an unprotected connection upon entering the correct password. The users are strongly
recommended to enable the "IP-connections filter for configuration" option of ET- 485 in case of network configuration (especially for
networks without other types of protection).
The unit protection system is not designed to counter malicious network attacks (especially those, which are not trying to get access to the
unit but to block it instead);
In case of complex and large networks (especially when providing access to the ET-485 via Internet), the users are recommended to
separate the unit from unprotected networks with standard protective equipment (router, configured to filter the transmissions, Firewall,
etc.).
