Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.

What is a `single point of failure, and how do I avoid having one?

0
10 Posted

What is a `single point of failure, and how do I avoid having one?

0

An architecture whose security hinges upon one mechanism has a single point of failure. Software that runs bastion hosts has bugs. Applications have bugs. Software that controls routers has bugs. It makes sense to use all of these components to build a securely designed network, and to use them in redundant ways. If your firewall architecture is a screened subnet, you have two packet filtering routers and a bastion host. (See question 3.2 from this section.) Your Internet access router will not permit traffic from the Internet to get all the way into your private network. However, if you don’t enforce that rule with any other mechanisms on the bastion host and/or choke router, only one component of your architecture needs to fail or be compromised in order to get inside. On the other hand, if you have a redundant rule on the bastion host, and again on the choke router, an attacker will need to defeat three mechanisms. Further, if the bastion host or the choke router needs to invoke its

Related Questions

Thanksgiving questions

*Sadly, we had to bring back ads too. Hopefully more targeted.