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I need some assistance with these assignment. the basic architecture of a secured network Thank you in advance for the help!
I need some assistance with these assignment. the basic architecture of a secured network Thank you in advance for the help! The security of servers becomes an important issue when it is exposed to such an un-trusted network.
A DMZ is a network implementation aiming at securing the internal network of an organization. It isolates the external connections requiring public services from the hosts on the internal private network.
The architecture of the network shown in the diagram is to provide web-based services to the external (internet) users and LAN services to the internal (corporate staff) users by employing a certain level of security.
If two different firewalls (from different vendors) having different security implementations can be used, the system becomes more secure. This is because if an intruder manages to get through the first firewall, the same algorithm cannot be used to get through the second one. Ample time would be available for the company’s network administrators to trace and shut down the intrusion.
The Outer firewall usually has two network interfaces. one for Internet and the other one for the DMZ. The firewall hides the addresses of the DMZ servers by using NAT (Network Address Translation) so their public addresses are the same as the address of the Outer firewall.
The setup is called “back-to-back perimeter network” and is located in between two firewalls. Having a DMZ in between two firewalls adds an extra layer of security since the inner firewall and the border firewalls can come from different vendors or be of different types if the DMZ is attacked, there is still a firewall left between the attacker and the internal network.
The inner firewall has more rules than the outer firewall, like TCP-port 80 (HTTP) is closed since it does not need to be open in order for the workstations of regular users, only for web servers. The firewall usually has two network interfaces: one for the DMZ and one for the internal network.
