Siemens SIMATIC NET SCALANCE MUM856-1, Руководство по эксплуатации

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Security recommendations
SCALANCE MUM856-1
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Operating Instructions, 08/2021, C79000-G8976-C628-02
• Enable only those services that are used on the device, including physical ports. Free
physical ports can potentially be used to gain access to the network behind the device.
• For optimal security, use SNMPv3 authentication and encryption mechanisms whenever
possible, and use strong passwords.
• Configuration files can be downloaded from the device. Ensure that configuration files are
adequately protected. The options for achieving this include digitally signing and
encrypting the files, storing them in a secure location, or transmitting configuration files
only through secure communication channels.
Configuration files can be password protected during download. You enter passwords on
the WBM page "System > Load & Save > Passwords".
• When using SNMP (Simple Network Management Protocol):
– Configure SNMP to generate a notification when authentication errors occur.
For more information, see WBM "System > SNMP > Notifications".
– Ensure that the default community strings are changed to unique values.
– Use SNMPv3 whenever possible. SNMPv1 and SNMPv2c are considered non-secure and
should only be used when absolutely necessary.
– If possible, prevent write access above all.
Secure/ non-secure protocols
• Use secure protocols if access to the device is not prevented by physical protection
measures.
• Restrict the use of non-secure protocols. While some protocols are secure (e.g. HTTPS,
SSH, 802.1X, etc.), others were not designed for the purpose of securing applications (e.g.
SNMPv1/v2c, RSTP, etc.).
Therefore, take appropriate security measures against non-secure protocols to prevent
unauthorized access to the device/network. Use non-secure protocols on the device using
a secure connection (e.g. SINEMA RC).
• If non-secure protocols and services are required, ensure that the device is operated in a
protected network area.