Making the Perfect Red Team Dropbox (Part 2)

This post outlines how to configure and operate a NanoPi R1S as a stealthy Ethernet-based person-in-the-middle tool for red-team operations, including detecting live ports, automating mode selection (unused port vs PITM), and masking traffic to evade NAC and port-security controls. It details setup steps (interface renaming, LED indicators, IPv6 suppression), opsec via network namespaces, and use of the slimjim toolkit with ebtables/iptables to impersonate victim MAC/IP while passively mapping the environment through dnsmasq and traffic snooping. The guide also highlights opportunities to capture NAC credentials with honeypots, limitations against 802.1X/MACsec, and remote access/monitoring methods using SSH tunneling and tcpdump/Wireshark.