US Military Cloud Email Data Breach
SANS Cloud Security
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As the US Department of Defense is managing their recent breach, cloud security architect expert,?David Hazar shares thoughts on how you can avoid a similar breach. "It is unfortunate that we continue to be plagued by misconfigurations in our cloud environments. This is why sound architecture and design when implementing our cloud infrastructure is so important.
"For email platforms, should we be setting up and hosting our own servers, or should we rely on cloud platforms? Hard to say, we have seen issues with both of these models over the last few years. We definitely should be tracking all of our publicly exposed services and responding quickly when changes open up more of our resources to the Internet. We can also look at different deployment models. While it is easy to set up a VNet or VPC with an Internet Gateway and secure servers with security groups, is there a better approach that provides some additional protection? While security groups are stateful software-defined firewalls that do provide protection and isolation, should we take a more layered approach to add some additional protection in case one of the layers is misconfigured?
The hub and spoke networking models for the cloud, when combined with firewall services, can provide that extra layer of protection. With these models, we may only have one entry point and exit point from our cloud environments. This allows us to implement centralized control with firewall services while still having the decentralized control offered by security groups. In this model, opening up a server to inbound access from the internet is not something that happens by mistake. There are specific load balancer or firewall translation rules that need to be put in place. This is not true for the average cloud environment where public subnets are the default."
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