Siemens CP 1542SP-1, Руководство по эксплуатации

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Configuration
4.1 Security recommendations
CP 154xSP-1
Operating Instructions, 12/2019, C79000-G8976-C426-05
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Protocols
Secure and non-secure protocols
● Only activate protocols that you require to use the system.
● Use secure protocols when access to the device is not prevented by physical protection
measures.
The NTP protocol provides a secure alternative with NTP (secure).
Table: Meaning of the column titles and entries
The following table provides you with an overview of the open ports on this device.
● Protocol / function
Protocols that the device supports.
● Port number (protocol)
Port number assigned to the protocol.
● Default of the port
–
Open
The port is open at the start of the configuration.
– Closed
The port is closed at the start of the configuration.
● Port status
–
Open
The port is always open and cannot be closed.
– Open after configuration
The port is open if it has been configured.
– Open (login, when configured)
As default the port is open. After configuring the port, the communications partner
needs to log in.
– Closed after configuration
The port is closed because the CP is always client for this service.
● Authentication
Specifies whether or not the protocol authenticates the communications partner during
access.