CPU 1516pro-2 PN (6ES7516-2PN00-0AB0)
Operating Instructions, 09/2016, A5E35873416-AA
59
Overview of the protection functions
Introduction
This section describes the following functions for protection of the ET 200pro distributed I/O
system against unauthorized access:
● Access protection
● Know-how protection
● Copy protection
Further measures for protecting the CPU
The following measures also increase the protection against unauthorized access to
functions and data of the CPU 1516pro-2 PN, both externally and via the network:
● Deactivation of the Web server
● Deactivation of the OPC UA server (you can find additional information on the security
mechanisms for OPC UA server in the Communication
(https://support.industry.siemens.com/cs/de/de/view/59192925/en
) function manual)
● Deactivation of the time synchronization via an NTP Server
● Deactivation of the PUT/GET communication
When the Web server is used, you protect the ET 200pro distributed I/O system from
unauthorized access
● By setting password-protected access rights for specific users in the user administration.
● By using the pre-set option "Permit access only via HTTPS".
The option allows access to the web server only with the secure hypertext transmission
protocol HTTPS.
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