Capdns
capdns is a network capture utility designed specifically for DNS traffic. This utility is based on tcpdump.
Some of its features include:
- Understands both IPv4 and IPv6
- Captures UDP, TCP, and IP fragments.
Problem background
In the dns test, packet capture is a common method, but dns requests are very frequent, which interferes a lot with the packet capture results. Sometimes it is necessary to only capture packages related to a specific domain name.
Dependencies
To install the dependencies under CentOS
yum -y install tcpdump
Instructions
~./capdns -domain www.infvie.com (default "www.infvie.com")
