Siemens SIMATIC NET TeleControl S7-1200 CP 1243-1 Operating Instructions Manual page 60

Configuration
4.8 Security
Creating a security user
To create a VPN tunnel, you require appropriate configuration rights. To activate the security
functions, you need to create at least one security user.
1. In the local security settings of the CP, click the "User login" button.
Result: A new window opens.
2. Enter the user name, password and confirmation of the password.
3. Click the "Logon" button.
You have created a new security user. The security functions are now available to you.
With all further logons, log on as user.
Select the "Activate security features" check box
After logging on, you need to select the "Activate security features" check box in the
configuration of both CPs.
You now have the security functions available for both CPs.
Creating the VPN group and assigning security modules
1. In the global security settings, select the entry "Firewall" > "VPN groups" > "Add new VPN
group".
2. Double-click on the entry "Add new VPN group", to create a VPN group.
Result: A new VPN group is displayed below the selected entry.
3. In the global security settings, double-click on the entry "VPN groups" > "Assign module
to a VPN group".
4. Assign the security modules between which VPN tunnels will be established to the VPN
group.
Note
Current date and current time on the CP for VPN connections
Normally, to establish a VPN connection and the associated recognition of the certificates to
be exchanged, the current date and the current time are required on both stations.
The establishment of a VPN connection to an engineering station that is also the telecontrol
server at the same time (TCSB installed), runs as follows along with the time of day
synchronization of the CP:
On the engineering station (with TCSB), you want the CP to establish a VPN connection.
The VPN connection is established even if the CP does not yet have the current time.
Otherwise the certificates used are evaluated as valid and the secure communication will
work.
Following connection establishment, the CP synchronizes its time of day with the PC
because the telecontrol server is the time master if telecontrol communication is enabled.
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Operating Instructions, 12/2016, C79000-G8976-C365-02
CP 1243-1