Internet Access v v 12312021 Firewall Deployment Models

Internet Access v v 12/31/2021 Firewall Deployment Models How the firewall secure internet access ? Policy and Rule Configuration Faculty : Trần Thị Ngọc Hoa 1

Overview ¡ It is a controlled point of access of all traffics : l l ¡ Purpose : l ¡ Prevent the potential dangers of the outside networks from spreading to your internal network. Implementation : l l l 12/31/2021 Enter the internal network Leave the internal network Hardware Software Combination of both Faculty : Trần Thị Ngọc Hoa 2

Deployment Models ¡ ¡ ¡ 12/31/2021 Bastion Host Three home firewall Back to Back firewall Faculty : Trần Thị Ngọc Hoa 3

Bastion Host 12/31/2021 Faculty : Trần Thị Ngọc Hoa 4

Three-homed Firewall 12/31/2021 Faculty : Trần Thị Ngọc Hoa 5

Back to Back Firewalls 12/31/2021 Faculty : Trần Thị Ngọc Hoa 6

Firewall Policy Access Rules: HTTP : Allow FTP : Allow PING : Deny HTTP FTP PING Internal Network External Network 12/31/2021 Faculty : Trần Thị Ngọc Hoa 7

Policy and Rule ¡ ¡ An access policy consists of the many access rules Rule elements : l l l l 12/31/2021 l Name Action Protocol Content Schedule Bandwidth priorities Source and Destination sets Faculty : Trần Thị Ngọc Hoa Users 8

12/31/2021 Faculty : Trần Thị Ngọc Hoa 9

12/31/2021 Faculty : Trần Thị Ngọc Hoa 10

Lab Demo External Server 12/31/2021 Faculty : Trần Thị Ngọc Hoa 11