Name: Siemens SCALANCE S615
Brand: Siemens
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1 Introduction

NAT_S615

Entry ID: 109744660, V1.1, 08/2017

1 Introduction

Starting situation

The SCALANCE S615 is a module from the security module product line and

protects industrial networks and automation systems against unauthorized access.

Thanks to its diverse features, the security module enables protection of different

network topologies and flexible implementation of security concepts:

 The option of VLAN structuring of its five Ethernet ports provides protection

against DoS attacks and unauthorized access.

 Access to the device and the adjacent network can be protected by a firewall

and VPN.

 Due to the configuration as a NAT router, the IP addresses of the industrial

networks or automation systems can be hidden from the outside world. In

addition, the IP address range can be used by multiple closed private networks

without causing address collisions.

Motivation for this documentation

Use of the SCALANCE S615 as a router and simultaneous support of common

NAT mechanisms provide numerous options for accessing the internal network or

automation system to be protected:

 Static routing

 NAPT

 NAT

 NETMAP

 IP masquerading

Static routing is always preferable over all other NAT variants. Depending on the

use case, NAT requires significant extra effort in terms of configuration and

handling.

However, some configurations cannot be solved using routing, for example, if no

gateway is desired. In these cases, a suitable NAT method must be used.

Siemens SCALANCE S615 Manual

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