Cisco Security Blog: Improving Cloud-VPN Resiliency to DoS Attacks With IKE Throttling

Aug 7, 2025

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Source URL: https://blogs.cisco.com/security/improving-cloud-vpn-resiliency-to-dos-attacks-with-ike-throttling
Source: Cisco Security Blog
Title: Improving Cloud-VPN Resiliency to DoS Attacks With IKE Throttling

Feedly Summary: Explore a network-layer throttling mechanism to improve the resiliency of Cloud VPNs IKE servers, which are typically subject to IKE flood attacks.

AI Summary and Description: Yes

Summary: The text addresses a network-layer throttling mechanism aimed at enhancing the resiliency of Cloud VPNs in the context of security threats such as IKE flood attacks. This is particularly relevant for professionals in the cloud computing security domain who must maintain robust infrastructure resilience against denial-of-service threats.

Detailed Description: The content discusses a technical approach to bolster the security of Cloud VPNs, specifically focusing on Internet Key Exchange (IKE) servers that often encounter IKE flood attacks. This mechanism is crucial for cloud security professionals and network administrators tasked with defending against potential vulnerabilities that can be exploited by malicious actors.

Key insights include:

– **Network-Layer Throttling Mechanism**: The introduction of this mechanism is intended to mitigate the impact of IKE flood attacks, which can overwhelm VPN servers, disrupt service, and compromise availability.

– **Enhanced Resiliency**: By implementing throttling, the system can effectively limit the number of incoming connection requests, thereby preventing overload and maintaining operational integrity.

– **Focus on Cloud VPN Security**: The emphasis on Cloud Virtual Private Networks highlights a segment of cloud computing security that is critical as organizations increasingly rely on cloud solutions for data transmission and secure communications.

– **Defense Against Denial-of-Service Attacks**: This approach serves as a defensive tool against denial-of-service (DoS) attacks, a prevalent threat in cybersecurity that targets network availability.

Overall, this discussion provides valuable insights into the protective measures that can be employed within cloud infrastructures to safeguard VPN services, demonstrating the ongoing need for innovation in response to rising cyber threats in the cloud environment.

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