SCALANCE W778-1 /W738-1
Operating Instructions, 07/2020, C79000-G8976-C450-06
7
Security recommendations
2
To prevent unauthorized access, note the following security recommendations.
General
•
You should make regular checks to make sure that the device meets these
recommendations and/or other security guidelines.
•
Evaluate your plant as a whole in terms of security. Use a cell protection concept with
suitable products (
https://www.industry.siemens.com/topics/global/en/industrial-
).
•
When the internal and external network are disconnected, an attacker cannot access
internal data from the outside. Therefore operate the device only within a protected
network area.
•
For communication via non-secure networks use additional devices with VPN
functionality to encrypt and authenticate the communication.
•
Terminate management connections correctly (WBM. Telnet, SSH etc.).
Physical access
•
Restrict physical access to the device to qualified personnel.
•
The memory card or the PLUG (C-PLUG, KEY-PLUG, security PLUG) contains
sensitive data such as certificates, keys etc. that can be read out and modified.
Software (security functions)
•
Keep the firmware up to date. Check regularly for security updates of the product.
You will find information on this on the Internet pages "Industrial Security
http://www.siemens.com/industrialsecurity
)".
•
Inform yourself regularly about security advisories and bulletins published by Siemens
ProductCERT (
http://www.siemens.com/cert/en/cert-security-advisories.htm
•
Only activate protocols that you really require to use the device.
•
Use the security functions such as address translation with NAT (Network Address
Translation) or NAPT (Network Address Port Translation) to protect receiving ports
from access by third parties.
•
Restrict access to the device with a firewall or rules in an access control list (ACL -
Access Control List).
•
If RADIUS authentication is via remote access, make sure that the communication is
within the secured network area or is via a secure channel.
•
The option of VLAN structuring provides good protection against DoS attacks and
unauthorized access. Check whether this is practical or useful in your environment.
