It happened again yesterday. I was taking a break on my back porch and listening to the Colorado summer rain when an alert hit my phone: news of another breach. They seem to be coming with a disturbingly increasing regularity and with ever more serious consequences. For example, one company, Code Spaces, was completely destroyed when they refused to pay an attacker who then destroyed their customers’ data. The Energetic Bear group accessed utilities’ networks and could have launched attacks against them. In all likelihood, the number, extent, and veracity of these attacks will simply continue to expand.
So what do you do? The good news is that the steps are well known and understood: place security controls into your network to isolate a set of subnetworks (typically called “zones”) and both set and monitor the potential access paths between the zones. This is the first set of defenses against attacks, and one which many organizations do not fully deploy.
It is common for me to see organizations that partially deploy zones – but do not monitor their implementation. This is akin to the multi-petabyte database that contains one incorrect byte of information: you can trust none of the information as a result.
So, the first step is to create clear and concise zones in your network and to analyze all potential access paths through your network to be sure that your zone rules are respected network-wide.
Do you do this? If so, what’s your approach?