Impacts to Zoom and Duo resulting from Russia’s attack on Ukraine

University Technology Services (UTS) is advising of current and upcoming changes to McMaster-provided services Zoom and Duo (two-factor authentication) as a result of the Russia-Ukraine conflict.

These services are now or will be unavailable to individuals attempting to authenticate from several countries and regions restricted by the Office of Foreign Assets Control (OFAC) — a financial intelligence and enforcement agency of the United States Treasury Department.

As of March 10, 2022, the locations below are impacted by this change. McMaster Zoom users trying to connect from any of these countries are most likely to be impacted. Please be aware that other service providers may implement similar sanctions at any time.

  • Cuba
  • North Korea
  • Iran
  • Sudan
  • Syria
  • Crimea region
  • Sevastopol region
  • Donetsk region
  • Luhansk region

Why is this happening?
Some U.S.-based service providers used by McMaster are blocking authentications from individuals whose IP address originate in a country or region in compliance with these sanctions.

What does this mean for McMaster?

With those dates in mind, individuals whose IP address originates from those countries or regions attempting to authenticate to one of these services may see an “Access denied” or other login failure message.

If you are a member of the McMaster community and are experiencing service access issues, please contact for support.

Remember to follow these recommendations to keep Zoom meetings secure. UTS will continue to monitor and communicate any additional impacted services.