A growing body of research has studied how autocratic regimes interfere with internet communication to contain challenges to their rule. In this review article, we survey the literature and identify the most important directions and challenges for future research. We structure our review along different network layers, each of which provides particular ways of governmental influence and control. While current research has made much progress in understanding individual digital tactics, we argue that there is still a need for theoretical development and empirical progress. First, we need a more comprehensive understanding of how particular tactics fit into an overall digital strategy, but also how they interact with traditional, “offline” means of autocratic politics, such as cooptation or repression. Second, we discuss a number of challenges that empirical research needs to address, such as the effectiveness of digital tactics, the problem of attribution, and the tool dependence of existing research.