In 2024, the central African country Chad has experienced several Internet outages (Figure 1), including an intentional, ongoing shutdown that began on 28 February that has cost the country more than USD $1M in GDP loss. Most of these outages presumably stem from the country’s poor Internet resilience — 24% as per the Pulse Internet Resilience Index, ranked […]
Reverse traceroutes allows users to measure routes to their own hosts from arbitrary networks without access to those remote networks to run the command.
In a world increasingly vulnerable to natural disasters and climate change-induced hazards, robust emergency communication systems are more critical than ever. Imagine a scenario where terrestrial communication networks are disrupted by multi-hazard risks (for example, an earthquake followed by a tsunami or a landslide), leaving communities isolated and first responders struggling to coordinate relief efforts. […]
Last month’s Internet shutdown in Sudan is the latest of a growing number of incidents where conflict compromises Internet connectivity and resilience in affected regions. In 2023, the International Institute for Strategic Studies Armed Conflict Survey recorded more than 180 regional and local conflicts, the highest number in 30 years. Access to the Internet during war and […]
The 10-hour Internet shutdown event in Pakistan on 8 February 2024 serves as a reminder of the critical role that the Internet plays in daily life.
In the second half of 2023 five more countries have joined the ranks of those with secured country-code Top Level Domains (ccTLD) and security keys deployed in the DNS root zone. Just about every Internet communication starts with a Domain Name System (DNS) lookup. The DNS is an essential piece of Internet infrastructure that translates […]
Some time ago, I wrote here about what we could learn from an analysis of data from Qrator Labs related to the diversity of cross-border Internet connectivity for countries worldwide. As a network of networks, the Internet can be characterized as a set of dependencies between networks. Dependencies for both connectivity and customers. An outage at any specific network […]