Rex Chang, Author at A10 Networks
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July 8, 2020

About Rex Chang

Rex is a seasoned technical solution leader with over 15 years of experience in cloud and networking security areas, focusing on driving solution readiness with product managers and supporting solution sales with account executives. Rex currently serves as a Sr. Technical Marketing Engineer for cloud security and DDoS solutions at A10 Networks.

All posts by the Author

July 8, 2020

NXNSAttack: A New DDoS Attack on Recursive DNS Resolvers

The purpose of a Distributed Denial of Service or DDoS attack is to prevent an online service from working properly by overloading a target service, say a web server, such that valid users either experience poor performance or, taken to the extreme, can’t connect to the target service at all. Whatever the degree of a…

July 6, 2020

What's so bad about the NXNSAttack DNS Amplification Attack?

How did NXNSAttack Against DNS Services get Noticed? In May 2020, the NXNSAttack was identified as a new DDoS attack on DNS servers by the cybersecurity researchers at Tel Aviv University. The NXNSAttack exploits the vulnerability at recursive DNS resolvers and triggers an amplification attack to other recursive DNS servers and authoritative DNS servers by…

January 29, 2019

What is Network Functions Virtualization & Virtualized Network Functions?

Among network engineers, Network Functions Virtualization (NFV) and Virtualized Network Functions (VNF) are discussed frequently but not without some confusion. Virtualized Network Functions commonly refers to the software form of network appliances such as a router, firewall, load balancer, etc. VNFs are mostly deployed as virtual machines (VMs) on Linux KVM or VMware vSphere hypervisors…