nast – Network Analyzer Sniffer Tool

Last Updated on July 12, 2021

Network Analyzer Sniffer Tool (nast) is a packet sniffer and a LAN analyzer based on Libnet and Libpcap.

nast can sniff in normal mode or in promiscuous mode the packets on a network interface and log it. It dumps the headers of packets and the payload in ascii or ascii-hex format. You can apply a filter. The sniffed data can be saved in a separated file.

nast also offers an ncurses interface.

Features include:

• Build LAN hosts list.
• Follow a TCP-DATA stream.
• Find LAN internet gateways.
• Discover promiscuous nodes.
• Reset an established connection.
• Perform a single half-open portscanner.
• Perform a multi half-open portscanner.
• Find link type (hub or switch).
• Catch daemon banner of LAN nodes.
• Control arp answers to discover possible arp-spoofings.
• Byte counting with an optional filter.
• Write reports logging.

Website: sourceforge.net/projects/nast.berlios
Support:
Developer: Embyte, Snifth
License: GNU GPL v2

nast is written in C. Learn C with our recommended free books and free tutorials.

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