Ngrep
From Forensics Wiki
| ngrep | |
|---|---|
| Maintainer: | Jordan Ritter |
| OS: | Linux |
| Genre: | Network forensics |
| License: | GPL |
| Website: | ngrep.sourceforge.net |
Ngrep is a tool that provides GNU grep's features applying them to the network layer.
Contents |
Overview
Ngrep recognizes IPv4/6, TCP, UDP, ICMPv4/6, IGMP and Raw across Ethernet, PPP, SLIP, FDDI, Token Ring and null interfaces.
Examples
Example 1: dump all common HTTP requests on a live network (eth0):
- ngrep -qd eth0 '^(GET|POST|HEAD|CONNECT)' 'tcp'
Example 2: the same, but from a network dump (out.pcap):
- ngrep -qI out.pcap '^(GET|POST|HEAD|CONNECT)' 'tcp'
Limitations
Ngrep cannot reconstruct data streams, it has no ability to match a string that is broken across two or more packets.
