Iran's Internet Blackout: Understanding the Technicalities and Consequences

Strategic Insights -

Iran's recent internet blackout has sparked concerns over the country's capacity to control its telecommunications infrastructure. This drastic measure severely limits citizens' ability to communicate and access reliable information during times of conflict. Iran's government has cited security concerns as the reason for shutting off the internet, but how does a country achieve such control, and could this happen anywhere in the world? The Conversation explores the technical aspects of internet control and shutdowns, highlighting the methods used to restrict access to online services.

Key Takeaways:

  • A country can control internet access by physically disconnecting incoming connectivity at the point of entry, similar to pulling the plug on a telephone exchange. This method allows for easy recovery of service when the government is ready, but has far-reaching impacts on citizens.
  • Governments can also control access to key internet services by modifying the domain name system (DNS), manipulating the connection between domain names and their underlying numeric addresses.
  • Another method involves manipulating the border gateway protocol (BGP), forcing local internet service providers to remove their BGP routes from the internet, making devices unserviceable and the rest of the world unable to "see" into the country.
  • Internet shutdowns are not uncommon around the world, with recent examples including Bangladesh in July 2024, Senegal in 2023, India in 2020, and Egypt in 2011.
  • Virtual private networks (VPNs) can help evade internet controls, but may not be effective when the internet is physically disconnected.
  • Independent satellite internet services provide a reliable alternative for internet access, especially in remote and rural areas where traditional connections are unavailable.

Statistics:

  • The Iranian government has spent years developing the capacity to directly control its telecommunications infrastructure.
  • In dozens of countries around the world, the internet is either routinely controlled or has been shut down in response to major incidents.
  • 2024 Bangladesh internet blackout lasted days, affecting student-led protests against government job quotas.
  • Senegal's 2023 internet access limitations were imposed to handle violent protests over a political leader's sentencing.
  • India's 2020 internet blackout in Kashmir lasted several months, exacerbating the region's conflict.
  • Egypt's 2011 BGP route withdrawal occurred during civil unrest.

Sources:

  • The Conversation -- Global Perspectives -- By Mohiuddin Ahmed, Senior Lecturer of Computing and Security, Edith Cowan University Dylan Carr/Unsplash
  • Internet shutdowns: here's how governments do it
  • Undersea cables are the unseen backbone of the global internet
  • Iran's internet blackout left people in the dark. How does a country shut down the internet? -- https://theconversation.com/irans-internet-blackout-left-people-in-the-dark-how-does-a-country-shut-down-the-internet-259546
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