Moxa EDR-810-VPN-2GSFP [117/139] Industrial secure router user s manual firewall

Moxa EDR-810-VPN-2GSFP [117/139] Industrial secure router user s manual firewall
Industrial Secure Router User's Manual Firewall
8-13
Modbus TCP Filtering controls both directions of communication between Modbus Master and Modbus Slave.
Users need to set up two rules for the data transaction between Master and Slave. One rule is to accept the
Master commands and another rule is to accept the Slave response.
NOTE
The main
Firewall Policy rules are the first tier of filtering in the Network Layer,
and the Modbus Filtering rules
are the second tier
of filtering in both the Network Layer and Application Layer.

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