pcapsipdump is libpcap-based SIP sniffer with per-call sorting capabilities. It writes SIP/RTP sessions to disk in a same format, as "tcpdump -w", but one file per SIP session (even if there is thousands of concurrent SIP sessions).
Getting started: http://pcapsipdump.sf.net/
Ettercap is a multipurpose sniffer/interceptor/logger for switched LAN.
It supports active and passive dissection of many protocols (even ciphered ones) and includes many feature for network and host analysis. Development has been moved to GitHub, https://github.com/Ettercap/ettercap
Passive Proxy Daemon sniffs packets and creates squid proxy logs
Passive Proxy Daemon (pproxyd) has moved to GitHub (https://github.com/rondilley/pproxyd )
This tool reads pcap format files or reads packets directly from the network, assembles web based traffic and generates squid proxy style logs.
ettercap-gg is a Gadu-Gadu IM ettercap dissector. It is a patch for ettercap sniffer that adds the ability to sniff Gadu-Gadu logins, passwords and messages. Gadu-Gadu (www.gadu-gadu.pl/) is the most widely used IM network in Poland with ~6mln users.
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Scanhill is a Microsoft Messenger Protocol Sniffer. Currently it can only intercept Instant Text Messaging. Given that mySQL is used, stored instant messages can be read through a browser interface that is written in PHP language.
imsniff is a pcap-based instant messaging sniffer. It captures the IM traffic in the network and is able to log conversations, contact lists, profile information, incoming email notifications, other MSN events, etc. Tested in Linux and Windows.
tcpick is a textmode sniffer; it tracks tcp streams, shows the status, reassembles and saves the data captured in files or displays them in the terminal in different modes (ascii, hex..). There is a color-mode. Useful to get files passively.
This product sniffs web traffic on a Linux/Unix machine and creates log files for each website in CLF, Accrue, or a Verbose format. It can be configured with any IP address/Port Number combination, or it can be configured with domain names or virtual h
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