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Transcript

  • 1. How Corporate Firewalls Work ● What's the firewall ● What's the packet ● Work of bastion host ● Screening router
  • 2. What's the firewall ● It is software to have aimed to control the communication with the outside, and to maintain safety. It is likely to be taken into hardware.
  • 3. What's the packet ● The one that big information was divided into small data. ● The telecommunication line can be efficiently used. Moreover, there is ● an advantage that it is possible to substitute it with other lines ● even if the trouble goes out partially because the route selection can ● be flexibly done, too.
  • 4. Work of Bastion host ● Computer that can access it by exceeding fire wall only strongly protected. The protocol and service are relaid, and forwarded.
  • 5. Screening router ● A screening router performs packet- filtering and is used as a firewall. In some cases a screening router may used as perimeter protection for the internal network or as the entire firewall solution.
  • 6. References ● http://www.atmarkit.co.jp/aig/02security/firewall.gif ● http://www.atmarkit.co.jp/fwin2k/network/tcpip001/fig ● http://www.bluechaos.be/blogs/media/blogs/DDD/Ba ● http://content.answers.com/main/content/img/CDE/S