Open Source JavaScript Packet Sniffers

Arkime is an open source, large-scale, full packet capturing, indexing, and database system designed to augment existing security infrastructure by storing and indexing network traffic in standard PCAP format. It offers full network visibility, facilitating the swift identification and resolution of security and network issues. Security teams gain access to the necessary network visibility data essential for responding to and investigating incidents to expose the full attack scope. Designed to be deployed across multiple clustered systems, Arkime provides the ability to scale to hundreds of gigabits per second. It allows security analysts to respond, reconstruct, investigate, and confirm information about the threats within your network, enabling appropriate responses quickly and precisely. As an open-source platform, Arkime provides users with the benefits of transparency, cost-effectiveness, flexibility, and community support.

Xplico is a Network Forensic Analysis Tool (NFAT). The goal of Xplico is extract from an internet traffic capture the applications data contained. For example, from a pcap file Xplico extracts each email (POP, IMAP, and SMTP protocols), all HTTP contents, each VoIP call (SIP, MGCP, MEGACO, RTP), IRC, WhatsApp... Xplico is able to classify more than 140 (application) protocols. Xplico cam be used as sniffer-decoder if used in "live mode" or in conjunction with netsniff-ng. Xplico is used also in CapAnalysis: http://www.capanalysis.net