By enforcing least-privilege policies, it effectively contains ransomware by blocking the lateral movement attackers use to spread across a network. Protect the high-value assets of the AI era, including model training clusters, inference services, and sensitive data pipelines. Continuous discovery and AI-driven intelligence ensure your segmentation policies remain accurate and enforceable as containers and other workloads spin up, scale, and disappear. By limiting unauthorized east-west communication, the platform reduces blast radius and prevents ransomware from spreading to critical assets. Stop attackers from moving through your network by enforcing granular, application-aware policies that adapt as your environment changes and scales.

When a VRF is instead configured in enforced-permit mode, communication between any two SGs is allowed by default. Since no communication between SGs is allowed by default, permit contracts are required to open specific communication between the SGs. The following diagram shows an example of a unidirectional contract allowing the endpoints in source security group Web_App sending Syslog messages (UDP dest port 514) to the Syslog servers in destination security group Infra. If one-way communication enforcement is preferred, a unidirectional contract can be created. Whenever a bidirectional contract is defined, NX-OS automatically creates the required return rule.

• By implementing segmentation strategies, organizations can reduce their attack surface, limit lateral movement, and contain potential breaches before they escalate.
• Meanwhile, businesses are struggling to secure these ever-expanding networks with 64% of IT and security leaders connecting over 5,000 assets to their corporate networks.
• This isolation simplifies audits and enhances visibility, allowing security teams to pinpoint vulnerabilities and address them more effectively.
• Modern cyber threats such as ransomware and advanced persistent threats (APTs) require segmentation strategies capable of preventing lateral movement and isolating compromised systems.

A major water utility secured critical infrastructure and protected essential services for 1.6 million people with Akamai Guardicore Segmentation. A global consulting firm secured 300,000 endpoints in two weeks in one of the world’s largest microsegmentation deployments. Expert-led implementation services to deploy, configure, and scale your segmentation — from initial use case delivery to full operational handover Granular policy enforcement stops unauthorized communications in real time and contains threats with precision. AI analyzes traffic patterns and evaluates exposure to generate policy recommendations with confidence scoring, evidence, and a recommended phased workflow for implementation. While business is the most common context, segmentation appears in several other fields.

Role of Data in AI

First, this approach enables logical isolation between different applications, preventing unintended or unauthorized interactions across application boundaries. Rather, GPO serves https://medhaavi.in/how-quickbooks-hosting-eliminates-the-desktop-limitation/ as a powerful framework for implementing security and segmentation policies once application components and their interactions have been identified. Enforcing security policies between different subnets within the same VRF routing domain is a common requirement in modern data center environments. VXLAN Security Groups (SGs) and Security Group ACLs (SGACLs) constructs provide an effective solution for NX-OS standalone platforms to implement security posture across the fabric. The VXLAN GPO solution allows classifying the connected endpoints and resources external to the fabric into segments, which are referred to as Security Groups (SGs). Gartner Peer Insights content consists of the opinions of individual end users based on their own experiences, and should not be construed as statements of fact, nor do they represent the views of Gartner or its affiliates.

Map out application dependencies and required communication paths before you start implementing. Implementing firewall rules (perimeter and internal) to strictly control which traffic is allowed to flow between segments. Utilizing servers with multiple Network Interface Controllers (NICs) to dedicate physical ports to different types of traffic (e.g., public internet, private backend communication, storage network access). While individual segments might scale easily, managing the interactions and policies between a growing number of segments can become increasingly complex. Depending on the segmentation strategy, you might need additional hardware or virtual resources for firewalls, routers, monitoring tools, or even duplicated services within isolated segments. Many users of these specific private cloud models report significant savings (here at OpenMetal, we’ve seen this commonly ranging from 30% to 60% for our customers coming from public cloud).

The definition of a bidirectional contract is required to establish two-way communication between entities (endpoints or external resources) belonging to the two security groups. Security contracts or SGACLs (Security Group Access Control Lists) formulate the security policy over the https://www.recycle100.info/the-essential-laws-of-explained-23/ network that defines if two endpoints are allowed to talk to each other or not. It is worth to be noted here that route leaking between the VRFs should be configured explicitly if the two endpoints of different VRFs are allowed to communicate (separation between security policy and network connectivity). Endpoints in the same SG can communicate without any contract while communication between the endpoints of different SGs is governed by SGACL contracts.

Threats from Ransomware

VXLAN GPO based security enforcement is not only limited to a single fabric but it can also be extended across multiple fabrics which are part of the same Multi-Site domain (MSD). This means it is essential to always learn the IP address of endpoints connected to the fabric, as policy lookups cannot be performed if only the MAC address is available. It is worth to mention here that, since a dedicated TCAM resource is used for SGACLs, it does not compromise the scale for ACL/NAT/QoS etc rules that are programmed in a separate TCAM space, usually referred to as Classification TCAM. Since no communication is allowed in this model to begin with, the contracts must be defined to permit the traffic between any two security groups. For any communication to take place over the fabric it has to be explicitly allowed by a contract. Since all the communication is allowed in this model, the contracts can be defined and used to deny the traffic between any two security groups.

By identifying distinct groups, businesses can allocate their budgets where they’ll have the most impact, develop products that solve specific problems, and craft advertising that feels relevant rather than generic. When a cyber-criminal gains unauthorized access to a network, segmentation or “zoning” can provide effective controls to limit further movement across the network. By weighing the benefits against the risks, choosing appropriate techniques, and following best practices, organizations can build more resilient and efficient private cloud infrastructures customized to their needs. Periodically review your segmentation policies, firewall rules, VLAN configurations, and access controls to ensure they are still relevant and effective. Employ automation tools (like Ansible, Terraform) for provisioning segments, applying network configurations (including bond and VLAN setups), managing firewall rules, and ensuring policy consistency.

• This approach minimizes the risk of unauthorized access, providing a more secure network environment.
• For example, if Bob’s account is compromised by an attacker, but Bob has no access to any sensitive data at all, then the attacker has, essentially, wasted his own time.
• Cyber threats are no longer limited to breaching the network perimeter; attackers now exploit vulnerabilities within internal networks, moving laterally to gain access to critical assets.
• Implementing the principle of least privilege ensures that users have the minimum access necessary for their tasks.
• For example, separating development and testing environments from production systems helps protect sensitive data and prevent disruptions.
• Even though the main aim of network segmentation is to prevent data breaches, it is also common among merchants that want to reduce their compliance scope.

The Endpoints connected to VXLAN fabric can be classified based on their IPv4/IPv6, MAC, Port, VLAN, VM attributes etc. VXLAN GPO feature was first introduced in the NX-OS 10.4(3)F release and has extended its capabilities and hardware support with the subsequent releases. Different user groups can be granted access exclusively to the applications necessary for their roles, ensuring that sensitive applications remain protected and reducing the organization's overall attack surface. Additionally, GPO makes it possible to implement user-based access controls.

This section describes GPO policy enforcement for North-South communication, where traffic is forwarded between the VXLAN fabric and external networks. In such case, it has been the best practice recommendation to only deploy the L3VNIs on the BGWs of different VXLAN fabrics to functionally stretch the VRF and allow the required inter-fabric routed connectivity. In the context of Multi-Site, a GPO enabled site is referred to as Policy-Aware site while the site that is not GPO enabled is referred to as Policy-Unaware site.