Siemens SCALANCE X-300 Configuration Manual page 89

Management ACL
Note
Note the following when enabling this function: A bad configuration on the "Management
ACL Configuration" page can result in you being unable to access the device. You should
therefore configure an access rule that allows access to the management before you enable
the function.
By clicking the check box, enable or disable access control to the management of the IE
switch.
As default, the function is disabled.
The access rules are managed on the "Management ACL Configuration" page, see section
Management Access Control List (Page 127)
Note
If the function is disabled, there is unrestricted access to the management of the IE switch.
The configured access rules are only taken into account when the function is enabled.
SNTP
Enables / disables synchronization of the IE switch system time over an SNTP server in the
network.
Supported version: SNTP V2
SIMATIC Time
Enables / disables synchronization of the IE switch system time using the SIMATIC time
protocol.
In this case, synchronization makes use of multicast frames sent to the address 09-00-06-
01-FF-EF.
An IE switch also evaluates SIMATIC time frames when it is logged on to an SNTP server.
NTP
Enables / disables synchronization of the IE switch system time via an NTP server in the
network.
Supported version: NTP V3
PTP
Note
This option is available only with switches capable of PTP.
Enables / disables synchronization of the IE switch system time with the PTP time sent out
by the master. To achieve this, the IE switch must be operated as a "Transparent Clock" in a
PTP network.
SCALANCE X-300 / X-400
Configuration Manual, 10/2014, C79000-G8976-C187-22
Configuration using Web Based Management and Command Line Interface
4.4 The Agent menu
89