SI-Ethernet User Guide 201
Issue: 3
Safety
information
Introduction
Mechanical
installation
Electrical
installation
Getting started Parameters
Key features
and Protocols
PC Tools
Applications
Security
Diagnostics
Glossary of
terms
Index
9 Security
9.1 Introduction
On open networked systems it is important that security is considered. Security covers aspects
such as access to devices using passwords, network infrastructure, company procedures and
backup procedures.
The physical system security should be enforced with acceptable user policies and appropriate
employee guidelines.
9.2 General site security issues
9.2.1 Connecting your computer
It is important to remember that when connecting your computer to an existing network you will
have an impact on the data and services on that network. Particular care should be taken not to
interrupt the flow of data by disconnecting cables, powering down switches/routers, or interrupting
data flow by sending large amounts of data over the network.
9.2.2 Virus considerations
Connecting your computer to a network carries the risk of transferring computer viruses to other
computers on that network. It is vital that when connecting to a network you ensure that your anti-
virus software is up to date and activated. Many operating system vendors offer regular product
updates to increase stability and reduce the risk of malicious programs causing damage to your
corporate infrastructure.
9.2.3 Firewall issues
When a high level of security is required between the automation network and the business
network a firewall should be used. This helps prevent unwanted traffic passing between the
networks and can be used to restrict access to certain machines or users.
9.3 Default restrictions
By default, all supported protocols are available. This can be changed using the relevant protocol
menu.
The use of a quality anti-virus solution on any networked system is recommended. The
overall network security policy resides with the network administrators and any connec-
tions to a network should be approved by the network administrators.
Some managed switches provide control methods for network traffic, however a firewall
offers significantly more features. Configuration of a switch or firewall is beyond the
scope of this document.
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