Lateral network traffic (or East-West) is network traffic that originates from one internal network segment and is destined for another internal segment. It encompasses communication between devices, servers, virtual machines, or containerized services, and is critical for the efficient, dependable operation of internal communication-based applications and services. North-South traffic, by contrast, refers to data flowing between internal and external networks like the internet, entering or exiting the perimeter where security policies are typically inspected and enforced rigorously.
The New Cybersecurity Battleground: East-West Traffic
For decades, cybersecurity strategies were built around a perimeter-first model, focusing primarily on monitoring and protecting North-South traffic—the flow of data entering and leaving enterprise networks. However, the rapid adoption of cloud computing, virtualization, microservices, containerization, and IoT has fundamentally changed the way modern organizations operate. Today, a significant majority of data center traffic moves internally between applications, workloads, virtual machines, containers, and cloud instances. This internal communication, known as East-West or lateral traffic, has become the backbone of modern digital infrastructure.
As organizations continue to embrace hybrid and multi-cloud environments, East-West traffic has grown exponentially. Yet, despite its importance, it remains one of the least visible areas of enterprise security. This lack of visibility creates a dangerous blind spot that allows attackers to move undetected within networks, spread malware, exfiltrate sensitive data, compromise business-critical assets, and exploit vulnerabilities long before security teams become aware of their presence.
The Visibility Gap Is Fueling Modern Breaches
The reality is that today’s most damaging cyberattacks are no longer defined by how attackers gain entry but by what they do after they get inside. Once a threat actor breaches a system, lateral movement becomes the primary tactic for expanding access, escalating privileges, and reaching high-value targets. Industry analysis reveals that more than 70% of successful breaches involve East-West movement techniques, making lateral visibility one of the most critical requirements in modern cybersecurity.
Unfortunately, most organizations are struggling to address this challenge. Research shows that 58% of organizations have difficulty gaining visibility into East-West traffic, while 86% of security professionals require packet-level capture at line rate to effectively perform their roles. Additionally, 65% of enterprises lack a unified view across multi-cloud environments, creating fragmented visibility that weakens security operations.
The problem extends beyond network architecture. A recent study found that 80% of organizations face network blind spots related to internet and cloud traffic, while 97% of CISOs admit they are forced to compromise on visibility, tool integration, or data quality. These findings highlight a concerning reality: visibility gaps are no longer isolated technical issues but accepted business risks. Compounding the challenge is the widespread adoption of encryption. Nearly 95% of web traffic is now encrypted, and newer protocols such as TLS 1.3 make traffic inspection increasingly difficult without specialized technologies.
Why East-West Visibility Has Become a Business Imperative
In today’s threat landscape, organizations cannot protect what they cannot see. Effective monitoring of lateral traffic provides the intelligence required to detect and stop threats before they escalate into major incidents. Visibility into East-West communications allows security teams to identify suspicious behavior, unauthorized access attempts, and abnormal movement across networks in real time.
One of the most significant benefits is the ability to detect lateral movement itself. Once inside a network, attackers move horizontally to locate valuable assets and elevate privileges. Continuous monitoring of internal communications enables organizations to recognize this behavior early and contain attacks before they spread. The same visibility is equally critical for combating ransomware, which remains the leading cause of major cyber incidents. By monitoring traffic across internal networks, cloud environments, virtual infrastructures, and containers, organizations can identify ransomware activity earlier, conduct proactive threat hunting, and accelerate incident response.
East-West visibility is also vital for identifying insider threats. Whether intentional or accidental, insiders can create substantial security risks through unauthorized access, privilege misuse, or data exfiltration. Monitoring internal communications helps security teams detect unusual behaviors that may indicate compromised accounts or malicious activity. Furthermore, visibility into internal traffic plays a crucial role in detecting Advanced Persistent Threats (APTs), which are specifically designed to remain hidden for extended periods. By identifying indicators of compromise such as command-and-control communications, suspicious lateral movements, and abnormal network patterns, organizations can significantly improve threat detection and response capabilities.
Beyond threat detection, East-West traffic analysis strengthens digital forensics, accelerates incident investigations, and enhances compliance monitoring. It enables organizations to enforce segmentation policies, validate access controls, identify policy violations, and demonstrate compliance with evolving regulatory requirements.
Why Indian Enterprises Cannot Afford to Ignore the Risk
The stakes for Indian organizations have never been higher. According to recent data breach studies, India recorded the world’s highest average data breach cost in 2025 at ₹22 crore (approximately USD 2.6 million), representing a 13% increase over 2024, when the average breach cost stood at ₹19.5 crore. Equally concerning is the average breach lifecycle, which remains approximately 263 days from identification to containment.
These figures highlight the immense financial and operational consequences of delayed threat detection. With the implementation of the Digital Personal Data Protection (DPDP) Act, organizations now face heightened regulatory scrutiny alongside the risks of financial loss and reputational damage. A breach that remains undetected due to poor visibility can result in prolonged attacker presence, larger data exposure, greater business disruption, and significant compliance penalties.
As a result, cybersecurity visibility has become a boardroom-level discussion. Executive leadership teams increasingly recognize that cyber resilience is directly tied to business resilience. Organizations that fail to monitor lateral traffic effectively risk exposing themselves to threats that can undermine customer trust, disrupt operations, and impact long-term growth.
Moving Beyond Traditional Observability
Many organizations rely heavily on Metrics, Events, Logs, and Traces (MELT) to monitor their environments. While these data sources remain important, they often provide only a partial view of what’s happening within increasingly complex hybrid infrastructures. In many cases, telemetry data can be altered, disabled, or manipulated, making it difficult to establish a complete and reliable picture of network activity.
This is where network-derived intelligence becomes essential. Deep observability extends beyond traditional monitoring approaches by providing direct visibility into communications occurring across public cloud, private cloud, on-premises, and hybrid environments. It delivers the context necessary to uncover threats that may otherwise remain invisible.
Eliminating Blind Spots with Gigamon’s Deep Observability Pipeline
Gigamon’s Deep Observability Pipeline was designed to address the visibility challenges of modern enterprises. By delivering network-derived intelligence to security and observability tools, it provides organizations with comprehensive visibility into physical, virtualized, containerized, and cloud-native environments. Unlike approaches that rely solely on MELT telemetry, Gigamon creates an immutable source of truth that strengthens security posture, improves operational efficiency, and reduces unnecessary complexity.
The platform captures, aggregates, enriches, and optimizes traffic across public, private, and hybrid cloud environments, including East-West communications. This enables organizations to eliminate blind spots and gain comprehensive visibility into workload interactions. One of its most powerful capabilities is encrypted traffic visibility. Given that 91% of cyber threats now use encrypted channels to evade detection, organizations require advanced decryption technologies to uncover hidden risks.
Through GigaSMART® decryption and Gigamon Precryption™ technology, organizations can gain visibility into encrypted traffic, including TLS 1.3 communications, without introducing operational complexity. This capability helps eliminate one of the largest blind spots in modern cybersecurity while supporting compliance requirements and Zero Trust security strategies.
The platform further enhances security operations through real-time threat detection and response capabilities, cloud-native integrations with AWS, Microsoft Azure, and Google Cloud Platform, and intelligent traffic optimization features such as packet deduplication, metadata generation, application filtering, and load balancing. Its Application Metadata Intelligence (AMI) capability provides deep application-layer visibility without requiring full packet capture, supporting over 7,000 protocols, applications, and user behaviors and delivering insights across 3,500 standard and custom applications.
Visibility Is the Foundation of Cyber Resilience
As cyber threats continue to evolve in scale, sophistication, and speed, visibility has emerged as the foundation of effective cybersecurity. Organizations can no longer rely solely on perimeter defenses or fragmented monitoring approaches. The ability to observe, analyze, and secure East-West communications has become essential for detecting lateral movement, combating ransomware, mitigating insider threats, improving incident response, and maintaining regulatory compliance.
The future of cybersecurity belongs to organizations that can eliminate blind spots and gain complete visibility across cloud, containerized, and hybrid environments. By embracing deep observability and prioritizing lateral traffic visibility, enterprises can transform cybersecurity from a reactive function into a proactive business enabler. In a world where attackers increasingly operate within networks rather than outside them, seeing what happens between workloads is no longer optional—it is a strategic necessity.
Chirag Raichura