NetSleuth

Its identifies and fingerprints network devices by silent network monitoring or by processing data from PCAP files.
NetSleuth is an opensource network forensics and analysis tool, designed for triage in incident response situations. It can identify and fingerprint network hosts and devices from pcap files captured from Ethernet or WiFi data (from tools like Kismet).  It is a free network monitoring, cyber security and network forensics analysis (NFAT) tool

Download