The people of Baduy Luar (Outer Baduy) have generally experienced social-environment changes in information and communication technology (ICT) use. In contrast, the people of Baduy Dalam (Inner Baduy) still consistently reject globalization’s influence on preserving cultural and environmental sustainability. For the Baduy Luar, digital media use of handphones and modern tools is a custom prohibition, but they still insist on using them because of the needs and leniency of traditional leaders of Baduy Luar (Kokolot). The research aims to analyze communication behavior and digital media information literacy skill of Baduy Luar. The research used a qualitative approach with a case study. Primary data was collected by in-depth interviews, observation, documentation, and literature study for secondary data. Steps of analysis are carried out by reducing the data using three main codings of open coding, axial coding, and selective coding, data display in narrative with the testing data validity using triangulation and drawing a conclusion. In conclusion, the results showed that custom factors significantly affect digital media information literacy skills, communication obstacles occurred, and digital media communication behavior of Baduy Luar people in the Internet of Things (IoT) era.