Analyse Linux networks through the ethereal world of Wireshark
What’s happening on your network? Tools exist to display raw data but you still need to put work in to uncover real information. Here’s where a network analyser comes in: it will separate the AIM chatter from the MSN; it will divide RPC from SMB. And the best open-source network analyser is Wireshark.
Previously, we’ve covered Linux security topics on ITWire and showed free tools like nmap and snort and tightening SSH. Wireshark’s purpose is to sniff network traffic, but moreso to interpret and analyse that traffic, giving a far more meaningful breakdown of the actual protocols and applications running, and the nature of the communication that is happening. This is known variously as protocol decoding, and dissecting.
This is terrific for security matters – like network intrusion detection, but that’s not all. Wireshark has an untold number of more regular uses, which include troubleshooting network problems and administering your system.
One of the best features of WIreshark is that it is open-source and extensible.
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