Proper Network Segmentation
Proper network segmentation is the cornerstone of a zero-trust network. Systems and devices must be separated by the types of access they allow and the information that they process. Network segments can act as the trust boundaries that allow other security controls to enforce the zero-trust attitude.
Improve Identity and Access Management
A necessity for applying zero-trust security is a strong identity and access management foundation. Using multifactor authentication provides added assurance of identity and protects against theft of individual credentials. Identify who is attempting to connect to the network. Most organizations use one or more types of identity and access management tools to do this. Users or autonomous devices must prove who or what they are by using authentication methods.
Least Privilege and Micro Segmentation
Least privilege applies to both networks and firewalls. After segmenting the network, cybersecurity teams must lock down access between networks to only traffic essential to business needs. If two or more remote offices do not need direct communication with each other, that access should not be granted. Once a zero-trust network positively identifies a user or their device, it must have controls in place to grant application, file, and service access to only what is needed by them. Depending on the software or machines being used, access control can be based on user identity, or incorporate some form of network segmentation in addition to user and device identification. This is known as micro segmentation. Micro segmentation is used to build highly secure subsets within a network where the user or device can connect and access only the resources and services it needs. Micro segmentation is great from a security standpoint because it significantly reduces negative effects on infrastructure if a compromise occurs.
Add Application Inspection to the Firewall
Cybersecurity teams need to add application inspection technology to their existing firewalls, ensuring that traffic passing through a connection carries appropriate content. Contemporary firewalls go far beyond the simple rule-based inspection that they previously have.
Record and Investigate Security Incidents
A great security system involves vision, and vision requires awareness. Cybersecurity teams can only do their job effectively if they have a complete view and awareness of security incidents collected from systems, devices, and applications across the organization. Using a security information and event management program provides analysts with a centralized view of the data they need.