Mythili Vutukuru

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This paper presents the design, implementation, analysis, and experimental evaluation of <i>speak-up</i>, a defense against <i>application-level</i> distributed denial-of-service (DDoS), in which attackers cripple a server by sending legitimate-looking requests that consume computational resources (<i>e.g</i>., CPU cycles, disk). With speak-up, a victimized(More)
Over the past few years, researchers have developed many <i>cross-layer</i> wireless protocols to improve the performance of wireless networks. Experimental evaluations of these protocols have been carried out mostly using software-defined radios, which are typically two to three orders of magnitude slower than commodity hardware. FPGA-based platforms(More)
Information about the geographic locality of IP prefixes can be useful for understanding the issues related to IP address allocation, aggregation, and BGP routing table growth. In this paper, we use traceroute data and geographic mappings of IP addresses to study the geographic properties of IP prefixes and their implications on Internet routing. We find(More)
The Internet’s current interdomain routing protocol, BGP (Border Gateway Protocol), has two modes of operation: eBGP (external BGP), used to exchange routing information between autonomous systems, and iBGP (internal BGP), used to propagate that information within an autonomous system (AS). In a “full mesh” iBGP configuration, every router has a BGP session(More)
Network intrusion detection and prevention systems are vulnerable to evasion by attackers who craft ambiguous traffic to breach the defense of such systems. A normalizer is an inline network element that thwarts evasion attempts by removing ambiguities in network traffic. A particularly challenging step in normalization is the sound detection of(More)
How does a dense WiFi network perform, specifically for the common case of TCP download? While the empirical answer to this question is `poor', analysis and experimentation in prior work has indicated that TCP clocks itself quite well, avoiding contention-driven WiFi overload in dense settings. This paper focuses on measurements from a real-life use of WiFi(More)
Network Function Virtualization (NFV) is a new trend in networking, where network functions are moving from custom hardware appliances to software implementations running on virtual machines (VMs) hosted on commodity hardware. While the benefits of NFV such as cost reduction and increased agility are well understood, doubts still exist on whether a software(More)