Information, Computer and Network Security Terms Glossary and Dictionary

Ngrep

Ngrep is a tool for “grepping” (searching for) specific information in network packets. Ngrep is a pcap-aware tool that allows users to specify extended regular or hexadecimal expressions to match against data payloads of packets. It currently recognizes IPv4/6, TCP, UDP, ICMPv4/6, IGMP and Raw across Ethernet, PPP, SLIP, FDDI, Token Ring and null interfaces, and understands BPF filter logic in the same fashion as more common packet sniffing tools, such as tcpdump and snoop.

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Ngrep