VergeCloud recently mitigated a sophisticated and large-scale Layer 7 (application layer) DDoS attack targeting one of its enterprise clients. The attack originated from a highly distributed and previously unidentified botnet, designed to overwhelm the application layer without disrupting the underlying infrastructure.
The VergeCloud security team prioritized minimizing impact on genuine visitors while neutralizing the attack. As an initial measure, they worked with the client to update their firewall settingsโallowing traffic exclusively from VergeCloudโs Points of Presence (PoPs) and blocking all direct connections to the origin server. This effectively stopped direct-to-IP attacks, but the domain-level attack persisted.
In response, the team implemented edge-level firewall rules that issued challenges to suspicious IP addresses based on behavioral indicators. Despite these measures, the attack continued, as it was being carried out by a botnet that did not match any known threat signatures and utilized a wide range of rotating IPs.
To escalate mitigation, VergeCloud began analyzing traffic patterns and temporarily blocking the most frequent offending IPs. However, the sheer volume and rotation of IPs made this approach insufficient for full mitigation.
The breakthrough came when VergeCloud deployed fingerprinting to log the TLS client signatures of incoming connections. Through this method, the team identified that the majority of malicious requests shared a distinct and abnormal fingerprint. Once this fingerprint was blocked at the edge, malicious traffic was immediately neutralized and service returned to normal without disrupting access for legitimate users.
This incident underscores VergeCloudโs commitment to proactive defense and its ability to adapt to complex and evolving cyber threats. Through a combination of traffic filtering, edge security, and advanced fingerprinting technology, VergeCloud ensured service continuity and protected its clientโs infrastructure from a potentially devastating attack
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