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IODA (Internet Outage Detection and Analysis) is an operational prototype system
that monitors the internet, in near-realtime, to identify macroscopic Internet
outages affecting the edge of the network, i.e. significantly impacting an AS
(Autonomous System) or a large fraction of a country.

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Methodology
IODA combines information from three data sources, establishes the relevance of
an event and generates alerts. The outage events and the corresponding signals
obtained through automated analysis are displayed on dashboards and interactive
graphs that allow the user to further inspect the data. See the IODA project
page for scientific references and for more information about our methodology.
Global Internet routing (BGP)
We use data from ~500 monitors participating in the RouteViews and RIPE RIS
projects to establish which network blocks are reachable based on the Internet
control plane.
Internet Background Radiation
We process unsolicited traffic reaching the Merit Network Telescope monitoring a
large unutilized IPv4 address block.
Active Probing
We continuously probe a large fraction of the (routable) IPv4 address space from
Georgia Tech servers and use a methodology developed by University of Southern
California to infer when a /24 block is affected by a network outage.
Partners
This platform was supported by NSF grant CNS-1228994 (Detection and Analysis of
Large-scale Internet Infrastructure Outages (IODA)).
This platform was supported by Department of Homeland Security Science and
Technology Directorate (DHS S&T) contract 70RSAT18CB0000015 (IODA-NP:
Multi-source Realtime Detection of Macroscopic Internet Connectivity
Disruption), and DHS S&T cooperative agreement FA8750-12-2-0326 (Supporting
Research and Development of Security Technologies through Network and Security
Data Collection).
This platform was supported by the Open Technology Fund under contract number
1002-2018-027.
Additional funding to work on visualization interfaces was generously provided
by a Comcast research grant.
Additional funding to support this platform was generously provided by a grant
from the Internet Society.
This platform was supported by U.S. Department of State, Bureau of Democracy,
Human Rights, and Labor and Bureau of Near Eastern Affairs.