I am a Computer Science graduate student in the PhD program at UC Berkeley. My advisor is Sylvia Ratnasamy, and my research interests are primarily in computer networks. I received my Master's from Berkeley in December 2012; my thesis focused on new deployment models for middleboxes.
I'm interested in big networking questions surrounding middleboxes, Internet-scale systems, measurement, Internet architecture, and cloud computing. Some of my past and current projects are below; a full list of my work is on my CV.
In a study of 57 enterprise networks, we found that middleboxes like firewalls and caches are expensive, failure-prone, and difficult to manage. To resolve these challenges, we built APLOMB, a service which allows enterprises to ditch their middleboxes entirely. With APLOMB, cloud providers offer middleboxes as a "service" to enterprise clients who tunnel their traffic to a nearby datacenter to receive security and performance processing services.
Services like firewalling, protocol acceleration, and caching are widely available today through the deployment of middleboxes. However, these capabilities are not exposed to end host applications through the `interface' the network exposes to them. We designed netcalls to allow end hosts to invoke and configure the advanced capabilities offered in any network their traffic traverses; for example, we built a web server which invokes inter-domain DDoS defense when it detects it is under attack.
IP timestamps are a little-known feature of every packet that traverses the Internet, allowing a client to request a simple timestamp from any router which handles the packet. We showed that IP timestamps are supported by a substantial fraction of routers on the Internet -- about 30% -- and that IP timestamps can be used for a number of useful measurements: measuring parts of the reverse path a packet takes from server to client, identifying when two IP addresses belong to the same router, and measuring course-grained link latencies.