ngrep

> Filter network traffic packets using regular expressions.

Capture traffic of all interfaces:

ngrep -d any

Capture traffic of a specific interface:

ngrep -d {eth0}

Capture traffic crossing port 22 of interface eth0:

ngrep -d {eth0} port {22}

Capture traffic from or to a host:

ngrep host {www.example.com}

Filter keyword 'User-Agent:' of interface eth0:

ngrep -d {eth0} '{User-Agent:}'

> This work is licensed under the Creative Commons Attribution 4.0 International License (CC-BY).

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