‘netsniff-ng – A Linux Network Analyzer and Networking Toolkit’
‘netsniff-ng is is a free, high performance Linux network analyzer and networking toolkit.
High performance is achieved by ‘zero-copy’ mechanisms, so that the kernel does not need to copy packets from kernelspace to userspace and vice versa.
For this purpose the netsniff-ng suite is libpcap independent, but nevertheless supports the pcap file format for capturing, replaying and performing offline-analysis of pcap dumps. Furthermore we focused on building a robust, clean and secure analyzer and utilities that complete netsniff-ng as a support for network development, debugging or penetration testing.’