January 16, 2015
Siemens SIMATIC S7-1200 (beginning with firmware version 4.0) and SIMATIC S7-1500 PLCs have a built-in firewall. By default, the maximum protection level is activated.
To establish communication with these PLC models, communication with third-party devices must be enabled. This setting is available in the TIA Portal programming software (see below).
Properties, TIA Portal
Protection, TIA Portal
Permit access with PUT/GET communication from remote partner
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