A Look at Defense-in-Depth
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What is Defense-in-Depth?
Defense-in-Depth
is the method to which multiple layers of defense protect a network. These
defenses are intended to delay an attacker's attempt to further into a system
but not stop them completely. By slowing down the attacker, the IT team has
time to reacted and mitigate any damage to the network.
The idea behind Defense-in-Depth stems from a military
strategy that revolves around having a weaker perimeter defense and
intentionally yielding space to buy time. In the case of cybersecurity, the
approach here involves multiple layers of control but not give up any ground.
Here is a video that can bring a little light on to the idea
of Defense-in-Depth from Network Direction:
Fig 1. A large scale highly secure deployment of Siebel Business Applications
Having a setup, such as the one
above, would bring security to any business of any size. In this case, for the
image above, the layout contains firewalls that physical and virtual. Even in a
home network, the router that the ISP provides will have a firewall built-in.
The computers that occupy the network well have them also. Meaning that
defense-in-depth is already at work in a home network without the owner
realizing that it is even there. However, this does not mean that security can
be lax. On the contrary, having extra security can go a long way. Password
protection and being aware of who you let on the network are the number one
ticket to protecting what you have and defending your network with layers of
protection.
Have you had any experience with
this week’s subject? If so, please leave a comment below. I would love to hear
from you!
If I left anything out and would like to correct or add more
to the topic, please do so in the comments.
Until next week!
References
Recommended network Topologies. (2015, April 15).
Moved. https://docs.oracle.com/cd/E63029_01/books/SecurHarden/securharden_netsecur002.htm
Defense in depth (computing). (2006, November 17).
Wikipedia, the free encyclopedia. Retrieved July 26, 2020, from https://en.wikipedia.org/wiki/Defense_in_depth_(computing)
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