NTA-NET (UGC-NET) Computer Science & Applications (87) Networks, Virtualization, & Cloud Computing-Network Security and Privacy Study Material (Page 19 of 24)

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Firewalls: Screened Host and the Packet Filters

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Screened Host

A screened host sits behind a firewall that exposes only that system to the external network.

  • Advantage: The firewall might be able to provide more protection to the system than the system՚s own network filters could.
  • Disadvantage: The firewall can be configured (possibly intentionally) to allow access to other systems in the extranet to and from the external network.

If the service that the screened host provides to the external network can be compromised, the attacker has access to t…

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Firewall Placement and Exploring the Internal Network

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Bastion Host

The bastion host topology is well suited for relatively simple networks and for those that don՚t offer any public Internet services.

Bastion Host
  • This is the only boundary. If anyone breaks the boundary, the protected network gets clear access to the protected netw…

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