netsniff-ng is a high performance linux network sniffer for packet inspection. Basically, it is similar to tcpdump, but it doesn't need syscalls for fetching packets. Instead, it uses an memory mapped area within kernelspace for accessing packets without the need of copying them to userspace ('zero-copy' mechanism). Therefore, netsniff-ng is libpcap independent. netsniff-ng can be used for protocol analysis and reverse engineering, network debugging, measurement of performance throughput or network statistics creation of incoming packets on central network nodes like routers or firewalls.
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