About Me

I am broadly interested in network measurement research and am actively working on measuring Internet addressing, topology, and connectivity.
Before joining CAIDA in 2019, I completed my Ph.D. in Computer Science from the University of Maryland, where I worked with Neil Spring and Dave Levin. My dissertation focused upon measuring residential Internet connectivity using active probes.

At CAIDA, I am continuing to develop methodologies to detect Internet connectivity outages as part of the IODA project with Alberto Dainotti.

Publications

Home is Where the Hijacking is: Understanding DNS Interception by Residential Routers

Audrey Randall, Enze Liu, Ramakrishna Padmanabhan, Gautam Akiwate, Geoffrey M. Voelker, Stefan Savage, and Aaron Schulman
In: IMC 2021 (To appear), Virtual event

A multi-perspective view of Internet censorship in Myanmar

Ramakrishna Padmanabhan, Arturo Filastò, Maria Xynou, Ram Sundara Raman, Kennedy Middleton, Mingwei Zhang, Doug Madory, Molly Roberts, and Alberto Dainotti
In: ACM FOCI 2021, Virtual event

DynamIPs: Analyzing address assignment practices in IPv4 and IPv6

Ramakrishna Padmanabhan, John P. Rula, Philipp Richter, Stephen D. Strowes, and Alberto Dainotti
In: CoNEXT 2020, Barcelona, Spain (Virtual event)

Trufflehunter: Cache Snooping Rare Domains at Large Public DNS Resolvers

Audrey Randall, Enze Liu, Gautam Akiwate, Ramakrishna Padmanabhan, Geoffrey M. Voelker, Stefan Savage, and Aaron Schulman
In: IMC 2020, Pittsburgh, USA (Virtual event)

Residential Links Under the Weather

Ramakrishna Padmanabhan, Aaron Schulman, Dave Levin, and Neil Spring
In: SIGCOMM 2019, Beijing, China

Geo-locating BGP prefixes

Philipp Winter, Ramakrishna Padmanabhan, Alistair King, and Alberto Dainotti
In: TMA 2019, Paris, France

How to find correlated Internet failures

Ramakrishna Padmanabhan, Aaron Schulman, Alberto Dainotti, Dave Levin, and Neil Spring
In: PAM 2019, Puerto Varas, Chile

Advancing the Art of Internet Edge Outage Detection

Philipp Richter, Ramakrishna Padmanabhan, Neil Spring, Arthur Berger, and David Clark
In: IMC 2018, Boston, USA

Reasons Dynamic Addresses Change

Ramakrishna Padmanabhan, Amogh Dhamdhere, Emile Aben, kc claffy, and Neil Spring
In: IMC 2016, Santa Monica, USA

Timeouts: Beware Surprisingly High Delay

Ramakrishna Padmanabhan, Patrick Owen, Aaron Schulman, and Neil Spring
In: IMC 2015, Tokyo, Japan

UAv6: Alias Resolution in IPv6 Using Unused Addresses

Ramakrishna Padmanabhan, Zhihao Li, Dave Levin, and Neil Spring
In: PAM 2015, New York, USA

Reports and Posters

Myanmar: Data on Internet blocks and Internet outages following military coup

Maria Xynou, Ramakrishna Padmanabhan, Phyu Kyaw, Myanmar ICT for Development Organization (MIDO), Arturo Filastò
Collaborative report, Mar 2021

Uganda: Data on Internet blocks and nationwide Internet outage amid 2021 general election

Maria Xynou, Simone Basso, Ramakrishna Padmanabhan, Arturo Filastò, DefendDefenders
Collaborative report, Jan 2021

An analysis of large Internet outages affecting Iranian networks in early 2020

Ramakrishna Padmanabhan, Anant Shah, Nima Fatemi, Alberto Dainotti
Collaborative report, May 2020

Iran’s nation-wide Internet blackout: Measurement data and technical observations

Ramakrishna Padmanabhan, Alberto Dainotti, Nima Fatemi, Arturo Filastò, Maria Xynou, Simone Basso
Collaborative report, Nov 2019

Benin: Social media blocking and Internet blackout amid 2019 elections

Roderick Fanou, Ramakrishna Padmanabhan, Arturo Filastò, Maria Xynou
Collaborative report, Apr 2019

We can find shared IP addresses

Ramakrishna Padmanabhan
APNIC blog, 2018

Reasons Dynamic Addresses Change

Ramakrishna Padmanabhan, Amogh Dhamdhere, Emile Aben, kc claffy, and Neil Spring
RIPE Labs article, 2016

Measuring Last-Mile Internet Reliability During Severe Weather

Ramakrishna Padmanabhan, Ramakrishnan Sundara Raman, Reethika Ramesh, Aaron Schulman, Dave Levin, and Neil Spring
In: IMC 2017, London, UK

Service

  • TPC member, Internet Measurement Conference (2019)

  • TPC member, Passive and Active Measurement Conference (2018, 2019, 2020, 2021)

See Also:

Blog