This post goes to anyone who`s interested in networking. am currently doing a certification course on networking and i stumbled on this application called Wireshark. Wireshark in network protocol analyzer that can read/write many different capture file formats: tcpdump (libpcap), Catapult DCT2000, Cisco Secure IDS iplog, Microsoft Network Monitor, NAI Sniffer (compressed and uncompressed), Sniffer Pro, and NetXray, Network Instruments Observer, Novell LANalyzer, RADCOM WAN/LAN Analyzer, Shomiti/Finisar Surveyor, Tektronix K12xx, Visual Networks Visual UpTime, and WildPackets EtherPeek/TokenPeek/AiroPeek among many others. It has alot of features that i am currently still learning to use, they claim to be "The World's Most Popular Network Protocol Analyzer" and i can`t depute that.
Wireshark is great protocol analyzer and packet sniffer but the downside is that it requires basic understanding of networking and TCP/IP. To download a copy click here.
For more information on wireshark Click here