dhcpdump – sniffer utility for analyzing DHCP packets.
I will give an example of the installation command in Ubuntu/Debian:
sudo apt-get install dhcpdump
Installation in CentOS:
sudo yum install dhcpdump
Let’s see what network interfaces are in the system:
ifconfig
ip a
Example of running dhcpdump with the name of the network interface:
dhcpdump -i eth0
An example of intercepting DHCP packets with only the specified MAC address ending:
dhcpdump -i eth0 -h ^02:b0:eb
I’ll give an example of displaying the result not on the screen, but in a file:
dhcpdump -i eth0 > ixnfo.com.txt
See also my articles:
Installing and using dhcping
What is DHCP and how does it work?
Testing a DHCP server with dhcpperf