The growth of new technologies has opened new horizons for the network traffic monitoring and analysis. Innovative solutions like eBPF and XDP marked a clear distinction between traditional methodologies and new ones, which lead to a more personalized and, sometimes, more efficient filtering. Although, despite their flexibility and effectiveness, these technologies may seriously harm system performance, since they move the entire monitoring engine into the lowest layers of the operative system, introducing new problems related to the significant delay that an inefficient program may insert. This thesis proposes unusual and innovative usages of these new technologies, strengthening and favouring an in-kernel analysis of packets, and dynamically inserting or removing user-defined monitoring programs, exporting only the desired metrics using lightweight and standard data-interchange formats.