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Once thought of as a perimeter defense security layer, firewalls are being brought into the infrastructure to protect different segments of the network such as finance, HR and engineering. Using firewalls as part of the internal network security solution will provide additional layers of access control to protect against the organization's sprawling definition of "authorized user," as well as provide attack containment. Adding firewalls to the infrastructure enables enterprises to protect specific resources, forcing users to authenticate themselves as they move from network to network, thereby reducing the risk of unauthorized access to sensitive information. In addition to user containment, internal firewalls add attack containment to the network to prevent damages from spreading in the event that an attack occurs. Examples of effective use of network segmentation include wireless LANs and customer extranets. Placing these users in their own segment, behind their own policy-based firewall, will allow enterprises to contain the users as well as any potential damages that may occur if an attack were to succeed. Rather than buying a separate, physical firewall for every segment, Juniper Networks provides the ability to segment the network through the high physical and virtual port densities of our products. Once thought of as a perimeter defense security layer, firewalls are being brought into the infrastructure to protect different segments of the network such as finance, HR and engineering. Using firewalls as part of the internal network security solution will provide additional layers of access control to protect against the organization's sprawling definition of "authorized user," as well as provide attack containment. Adding firewalls to the infrastructure enables enterprises to protect specific resources, forcing users to authenticate themselves as they move from network to network, thereby reducing the risk of unauthorized access to sensitive information. In addition to user containment, internal firewalls add attack containment to the network to prevent damages from spreading in the event that an attack occurs. Examples of effective use of network segmentation include wireless LANs and customer extranets. Placing these users in their own segment, behind their own policy-based firewall, will allow enterprises to contain the users as well as any potential damages that may occur if an attack were to succeed. Rather than buying a separate, physical firewall for every segment, Juniper Networks provides the ability to segment the network through the high physical and virtual port densities of our products.

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