NETVISOR

Summary from the TLDR InfoSec newsletter

netVisor is an open-source network topology discovery and visualization tool that automatically scans networks to identify hosts, services, and their relationships, generating interactive documentation of network infrastructure. The tool employs a server-daemon architecture, where lightweight agents perform network scanning from multiple vantage points (supporting VLAN mapping) and report to a central PostgreSQL-backed server. This server generates visual topology maps, automatically detecting over 50 common services, including virtualization platforms, network infrastructure, and security tools. Security teams can leverage this for asset inventory, network segmentation validation, and maintaining up-to-date network documentation without the need for manual diagramming.