Marinho Barcellos

Senior Lecturer

University of Waikato

In October 2019 I joined the School of Computer and Mathematical Sciences at University of Waikato. Between 2010 and 2019 I worked at INF/UFRGS Federal University (Associate Professor) and prior to that, at UNISINOS University (1993-2008) and PUC-RS University (2008-2009).

I have regularly contributed to the network research community by serving in multiple committees. I was the general co-chair of ACM SIGCOMM 2016 and have been serving as Program Committee co-chair of ACM CoNEXT 2022. I have contributed as a member of several Technical Program Committees of conferences: ACM CoNEXT, IEEE INFOCOM, IEEE ICNP, ACM HotNets, ACM IMC, IFIP Networking, etc. I was a member of the ACM SIGCOMM SIGCOMM executive committee 2017-2021, and have been a co-chair of the ACM SIGCOMM CARES committee. I also contributed as a member of the steering committees of ACM CoNEXT and the PAM conference. Looking forward, I will be chairing the Advisory Board of the ACM PACM-NET journal.

I am fortunate to have supervised many bright students (and hope some new ones look for me in the future). Contact me if you are interested, but to be sure I am a good fit for you, please first read my recent papers and be ready to talk about the ones that interested you: it’s a proof-of-work without which you may not get a response :)

My research has addressed a range of challenges as technology evolved, covering the non-functional properties of performance, security and resilience of networked systems and their underlying protocols. Because of the relevance of security and the Internet, this has been my main focus of interest for a number of years.


  • Internet measurements
  • Network security
  • Programmable data planes
  • VANETs


  • PhD in Computer Science, 1998

    Newcastle University, UK

  • MSc in Computer Science, 1993

    Federal University of Rio Grande do Sul (UFRGS), Brazil

  • BSc in Computer Science, 1989

    Federal University of Rio Grande do Sul (UFRGS), Brazil



  • glad to join as PC member of ACM IMC 2023
  • contributing to a working group tasked with discussing the future of SIGCOMM conferences, such as SIGCOMM, IMC and CoNEXT
  • will be helping as one of the travel grant chairs for CoNEXT 2023 in Paris. some ideas are in the oven. feel free to send me suggestions on how to improve the support CoNEXT provides to students and faculty from under-priviliged communities
  • beginning work as Deputy Head of Department, Computer Science



PhD Students


Fabricio Mazzola

UFRGS PhD 2019-…


Christopher Lorier

UoW PhD 2019-…


Felipe Boeira

UFRGS MSc 2017-2018, LiU PhD 2019-…


Atthapan Daramas

UoW PhD 2020-…


Dimeji Fayomi

UoW PhD 2019-…

Master Students


Bruce Parkinson

UoW MCS 2022


Ravjot Singh Samra

UoW MCS 2022


Samuel Davies

UoW MCS 2022



Miguel Neves

UFRGS PhD 2015-2020, now a post-doc at Dalhousie University


Lucas Muller

UFRGS MSc 2012-2014, UFRGS PhD 2015-2020, now a Senior Technical Lead at Cisco, San Francisco


Lucas Freire

UFRGS MSc 2016-2018, now at Banrisul Bank


Rodolfo Antunes

UFRGS PhD 2010-2016, now an Adjunct Professor at UNISINOS University


Rodrigo Mansilha

UFRGS MSc 2009-2012, UFRGS PhD 2012-2017, now an Adjunct Professor at UNIPAMPA University


Flavio Santos

UFRGS MSc 2008-2010, UFRGS PhD 2010-2013, now a Data Infrastructure Engineer at Spotify, Sweden


Tobias Petry

UFRGS MSc 2013-2015, now a Systems Programmer at Conectivida


Daniel Marcon

UFRGS MSc 2011-2013, UFRGS PhD 2013-2017, now a Professor at UNISINOS University


Akhil Chandel

UoW MCS 2021, now with Gallagher Security


Florin Zaicu

UoW PhD 2019-…


Rodrigo Oliveira

UFRGS MSc 2011-2013, UFRGS PhD 2013-2018 (inc), now a Software Development Lead at Nelogica

Public service

ACM SIGCOMM Committees
Steering Committees
  • ACM CoNEXT 2019-2021
  • PAM Passive & Active Measurement Conference 2019-…
Program Chair
Program Committees
Organisation Committees


Google Scholar profile.

(2005). Reliable multicast for the Grid: a case study in experimental computer science. Philosophical Transactions: Mathematical, Physical and Engineering Sciences.


Why are you receiving connection attempts from this host?

These connections are part of a computer science research project at the University of Waikato, School of Computing & Mathematical Sciences. This research involves making a small number of harmless connection attempts to every publicly accessible computer on the Internet. Similarly to so many other scientific studies, this allows us to methodologically measure the Internet and analyse trends in technology deployment and security.

As part of this specific investigation, every public IP address in the Aotearoa’s cyberspace receives a handful of packets on IANA standard and non-standard ports. These consist of conventional connection attempts followed by RFC-compliant protocol handshakes with responsive hosts. We use only tools that have been used in dozens of other scientific studies worldwide (e.g. ZMap, Masscan, ZGrab2 and LZR). We never attempt to exploit security problems, guess passwords, or change device configurations. Furthermore, we only receive data that is publicly visible to anyone who connects to a particular address and port.

This project was ethically approved by the University and follows the widely accepted best practices for Internet scanning measurements.

Why are we collecting this data?

The data collected through these connections consists only of information that is already publicly visible on the Internet. It helps us, computer scientists, study the deployment and configuration of network protocols and security technologies. We may be able to detect vulnerable systems and responsibly report the problems to the network operators.

This research helps the scientific community accurately study the Internet.

How to opt out of these measurements

The data is sometimes used to detect security problems and to inform operators of vulnerable systems so that they can be fixed. If you opt out of the research, you might not receive these important security notifications.

If you wish to opt out, please use research-abuse@wand.net.nz to let us know. We will promptly exclude your network from the set of measurements.

Dr. Marinho Barcellos
WAND Research Group
University of Waikato


Computer Science Graduation ceremony, 2015/1, keynote speaker (see distinctions below).

School of Computing and Mathematical Sciences, University of Waikato

Trimester 2022-B (July to November)
  • COMPX515: Security for Advanced Networks
  • COMPX101: Introduction to Programming (with Colin Pilbrow)
Trimester 2021-A (March to July)
  • ENGEN103: Engineering Computing HAM/TGA (with Jacob Heerikhuisen)
Trimester 2021-B (July to November)
  • COMPX515: Security for Advanced Networks
Trimester 2021-A (March to July)
  • COMPX203: Computer Systems (with David Bainbridge)
  • COMPX101: Introduction to Programming
Trimester 2020-B (July to November)
  • COMPX515: Security for Advanced Networks
  • COMPX318: Mobile Computing and the Internet of Things (with Bill Rogers)
  • COMPX374: Software Engineering Industry Project (with Vimal Kumar)
Trimester 2020-A (March to July)
  • COMPX101: Introduction to Programming (with Mike Mayo).

Institute of Informatics, Federal University of Rio Grande do Sul

  • CMP267: Novel Internet Architectures and Paradigms. This course presented “the five Internets”, historical, empirical, devices (IoT), content (ICN), and software (SDN, NFV, P4). 2013-2019
  • CMP230: Systems Security. Main parts of Matt Bishop’s book Computer Security: Art & Science. 2013-2018
  • CMP260: P2P Networks. 2010-2012
  • INF1154: Computer Networks. Based on Jim Kurose & Keith Ross' book Computer Networks: a top-down approach. 2010-2019
  • INF1142: Operating Systems. Based on Peterson & Silberschatz' book Operating System Concepts. 2008-2010

Teaching Awards

In Brazil, there is typically one graduation ceremony per semester, with students graduating in Computer Science or Computer Engineering programs. Each of these undergraduate programs select, by vote, two professors they considered the best/most influential in their 4-5 years of study. This is a very prestigious distinction, specially when the faculty is in the order of 60-70 professors and lecturers. I have been fortunate enough to be awarded several times in my career, spanning different higher-education institutions.

  • Best Lecturer: Computer Science, UFRGS, class of 2017/1
  • Best Lecturer: Computer Science, UFRGS, class of 2016/2
  • Best Lecturer: Computer Science, UFRGS, class of 2016/1
  • Best Lecturer: Computer Science, UFRGS, class of 2015/1
  • Best Lecturer: Computer Science, UFRGS, class of 2011/2
  • Best Lecturer: Computer Science, UNISINOS University, class of 2007/2
  • Best Lecturer: Computer Science, UNISINOS University, class of 2007/1
  • Best Lecturer: Computer Science, UNISINOS University, class of 2006/1
  • Best Lecturer: Computer Science, UNISINOS University, class of 2002/2


  • marinho.barcellos@waikato.ac.nz
  • +64 7 837 9642
  • School of Computing & Mathematical Sciences, The University of Waikato, Private Bag 3105, Hamilton, Waikato 3240
  • Gate 8, Block G, 1st. floor, Office G.1.05
  • Monday to Friday 9:00 to 17:00
  • DM Me