Russia is experimenting with more precise technology to block individual online services after an attempt to shut down banned messaging service Telegram failed, but Moscow has yet to find a way to shut it down without hitting other traffic.
Telegram, which has 200 million global users and has been popular in countries including Russia and Iran, has been banned in Russia because it refused to comply with a court order to give security services access to users' encrypted messages.
Russia's authorities started trying to block the service in April but they inadvertently blocked Russian users' access to a slew of unrelated online services, including voice calls on the Viber messaging service, cloud-based applications for Volvo cars, and apps that control Xiaomi video cameras.