Marinho Barcellos

Senior Lecturer

My Profile at University of Waikato

Since October 2019 I have been with the University of Waikato. In the past, I worked at INF/UFRGS Federal University (Associate Professor, 2010–2019), UNISINOS University (Adjunct Professor, 1993–2008), PUC-RS University (2008–2009), as well as an Invited Adjunct Professor at UNAL, Colombia.

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. My key research interest has been on Internet measurements and network security.

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 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, and 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 :) If you are unaware of my work, I may not respond to your email.


  • Internet measurements
  • Network security


  • 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



  • talk on remote peering to be presented in APRICOT 54 peering forum
  • new measurement paper about remote peering to appear in IEEE/ACM Transactions on Networking. congratulations, Fabricio!
  • joining ACM SIGCOMM 2024 PC, in Sydney, part of an experiment – ``we plan to release anonymized and sanitized reviews for accepted papers, as well as submitted versions of the papers.''
  • Philipp and Bajpai will organise a great PAM 2024 (Passive and Active Measurement Conference). happy to contribute to its success in the pc
  • our paper exploring the use of NLP to characterise amplification DDoS from flow samples was accepted at PACMNET journal and will be presented in CoNEXT'23 in Paris. well done, Rav!
  • best reviewer award received from SBSeg 2023 (the Brazilian Symposium on Information and Systems Security)
  • congratulations, Felipe, who successfully defended his PhD thesis (LiU, Sweden). Thanks Mikael for the opportunity to co-supervise Felipe.
  • happy to contribute to AINTEC'24 as a PC co-chair (with Polly Huang)
  • got a taste of Thailand as a keynote in the BKNIX Peering Forum. the event organisation was spotless, in May.
  • helping as Advisory PC member for IEEE INFOCOM 2024
  • busy teaching two full papers right now (July-November): COMPX204 Practical Networking and Cyber Security and COMPX515 Security of Advanced Networks.



PhD Students


Atthapan Daramas

UoW PhD 2020-…


Dimeji Fayomi

UoW PhD 2019-…


Ravjot Singh Samra

UoW MCS 2022, UoW PhD 2023-…

Master Students


Bernard Sullivan

UoW MCS 2024


Bhim Rai

UoW MCS 2024


Chumao Wu

UoW MCS 2024


Kevin Han

UoW MCS 2024


Niamh Athy

UoW MCS 2024


Peter Wanyonyi

UoW MCS 2024


Xiaoye Hua

UoW MCS 2024



Felipe Boeira

UFRGS MSc 2017-2018, LiU PhD 2019-2023


Fabricio Mazzola

UFRGS PhD 2019-2023


Christopher Lorier

UoW PhD 2019-2023


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


Bruce Parkinson

UoW MCS 2022


Florin Zaicu

UoW PhD 2019-2022


Rodrigo Oliveira

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


Samuel Davies

UoW MCS 2022

Public service

Editorial Committees
Steering Committees
  • ACM CoNEXT 2019-2021
  • PAM Passive & Active Measurement Conference 2019-…
Program Chair
ACM SIGCOMM Committees
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 2023-B (July to November)
  • COMPX204: Practical Networking and Cyber Security
  • COMPX515: Security for Advanced Networks
Trimester 2023-A (February to July)
  • COMPX304: Advanced Networking and Cyber Security (with Vimal Kumar)
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
  • 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