Configuration
4.16 Security
CP 1243-8 IRC
Operating Instructions, 02/2018, C79000-G8976-C385-03
111
Use the certificate by taking the following steps:
1. Save the certificate of your e-mail service provider in the file system of the engineering
station.
2. Import the certificate into your STEP 7 project with "Global security settings > Certificate
manager".
3. Use the imported certificate with every module that uses encrypted e-mails via the
"Certificate manager" table in the local "Security“ parameter group.
For the procedure, refer to the section Certificate manager (Page 120).
Log settings - Filtering of the system events
Communications problems if the value for system events is set too high
If the value for filtering the system events is set too high, you may not be able to achieve the
maximum performance for the communication. The high number of output error messages
can delay or prevent the processing of the communications connections.
In "Security > Log settings > Configure system events", set the "Level:" parameter to the
value "3 (Error)" to ensure the reliable establishment of the communications connections.
VPN (Virtual Private Network)
VPN tunnel
Virtual Private Network (VPN) is a technology for secure transportation of confidential data in
public IP networks, for example the Internet. With VPN, a secure connection (tunnel) is set
up and operated between two secure IT systems or networks via a non-secure network.
One of the main features of the VPN tunnel is that it forwards all frames even from protocols
of higher layers (HTTP, FTP telecontrol protocols of the application layer etc.).
The data traffic between two network components is handled unrestricted through a physical
network. This allows networks to be connected together via an intermediate network.
VPN tunnels ensure integrity and confidentiality during data transmission.
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