Configuration, programming
4.8 Security
CP 1543-1
62 Operating Instructions, 12/2019, C79000-G8976-C289-08
data, it transports its own network packets and therefore operates independent of the rest
of this network.
● VPN allows communication of the VPN partners with the assigned network.
● VPN is based on tunnel technology, can be individually configured, is customer-specific
and is self-contained.
● Communication between the VPN partners is protected from eavesdropping or
manipulation by using passwords, public keys or a digital certificate (= authentication).
Areas of application
● Local area networks can be connected together securely via the Internet ("site-to-site"
connection).
● Secure access to a company network ("end-to-site" connection).
● Secure access to a server ("end-to-end" connection).
● Communication between two servers is possible without being accessible to third parties
("end-to-end" or "host-to-host" connection).
● Ensuring information security in networked automation systems.
● Securing the computer systems including the associated data communication within an
automation network or secure remote access via the Internet.
● Secure remote access from a PC/programming device to automation devices or networks
protected by security modules is possible via public networks.
Cell protection concept
With Industrial Ethernet Security, individual devices, automation cells or network segments
of an Ethernet network can be protected:
● The access to individual devices or even to entire automation cells protected by security
modules is allowed.
● Secure connections via non-secure network structures becomes possible.
Due to the combination of different security measures such as firewall, NAT/NAPT routers
and VPN via IPsec tunnels, security modules protect against the following:
● Data espionage
● Data manipulation
● Unwanted access
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