arpspoof libnet init UID or EUID of 0 required

Question

I am trying to do Arp Spoofing. I run the command:

arpspoof -i eth0 -t 192.168.2.1 192.168.2.56

but I am getting the following error:

arpspoof: libnet_init(): UID or EUID of 0 required

Answer 1

ARP Spoofing should be done by superusers. Switch to superuser:

sudo -s

and then try, it should work.