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Passive Discovery Tool Description

This tool passively listens to IPv4 traffic on your network and provides a list of active IPv4 devices on your subnet.

The subnet starting IP and subnet mask are user definable. This tool shows the last time a packet was received, the protocol of that last packet and the source/destination ports (if applicable). It also shows the tool session count of IP packets received which can be used to identify systems that talk too much due to a virus or trojan malware program. Results are tabulated in a SQLite database and may be optionally saved for future reference.

Note that this tool requires the use of WinPcap. We install WinPcap as part of the installation package. WinPcap is designed for wired ethernet cards, not modems and it usually works with wireless 802.11x interfaces.

Screenshot of Passive Discovery showing found LAN IP addresses