Abstract
Due to the increasing development of computer systems and information networks, power grids should change extensively too. Nowadays, substantial movement has begun to implement the Smart Grid industry around the world. Since with the creation of smart electricity grids, it is possible to access the internal network from the external spaces, it is also necessary to protect information and data against unauthorized access. Therefore, a firewall should be used for information security. The firewall based on existing security regulations, decides which data is incoming to the network or going out of the network. Considering the discussions of passive defense topics at the national level and also the high importance of information security in Smart Grids, in this paper, in addition to examining the Firewalls, its advantages and disadvantages are also stated. Although the firewall has a major role in establishing security, and its installation and appropriate configuration can only be one of the primary activities in this field, we should also take advantage of other security mechanisms to enhance the security of the Smart Grid.
Highlights
Nowadays, an extensive movement has begun to implement the Smart Grid industry, whereby old networks are being replaced by Smart Grids around the world and modernization of the current electrical grid is of main concern with many electricity companies in the world
Smart Grids, based on the use of effective communication technologies between smart components, have an important role in operational efficiency, cost savings, and reliability improvement, since the intelligence of smart grid is built based on information exchange across the power grid [1,2,3,4,5,6]
If the precautions and necessary protections have not been done in the Smart Grid, subversion or misuse of the information network would be likely to occur
Summary
An extensive movement has begun to implement the Smart Grid industry, whereby old networks are being replaced by Smart Grids around the world and modernization of the current electrical grid is of main concern with many electricity companies in the world. Connection to telecommunications and computer networks, whether through a local network or via a phone line, allows external users to access the internal network. For this reason, information and data protection against any unauthorized access is required. Information security of computer networks against these attacks is an undeniable necessity in Smart Grids. The system administrator sets the rules of the firewall according to desired security level Firewalls, depending on their types, provide possible ways. The Firewall traps information packets inside and outside networks, analyzes them, and lets them enter or exit, or just takes them out of the way. Firewalls may have some security commands that change the content of packets with a specific procedure before sending them [16,17]
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