Siemens SIMATIC ET 200SP - 9 Protection; Overview of the Protective Functions of the CPU

Distributed I/O system
155 System Manual, 09/2019, A5E03576849-AJ
Protection
9
9.1 Overview of the protective functions of the CPU
Introduction
This chapter describes the following functions for protecting the ET 200SP against
unauthorized access:
● Access protection
● Know-how protection
● Copy protection
Further measures for protecting the CPU
The following measures additionally increase the protection against unauthorized access to
functions and data of the CPU from external sources and via the network:
● Deactivation of the Web server
● Deactivation of the OPC UA server (you will find further information on the security
mechanisms for OPC UA servers in the Communication
(https://support.industry.siemens.com/cs/ww/en/view/59192925
) function manual)
● Deactivation of time synchronization via an NTP server
● Deactivation of PUT/GET communication
When using the Web server, you protect your ET 200SP distributed I/O system against
unauthorized access
● By setting password-protected access rights for certain users in user management.
● By using the default "Allow access via HTTPS only" option.
This option allows access to the Web server with the secure Hypertext transfer protocol
HTTPS only.