Okay so I ran
1. iptables –flush
2. echo 1 > /proc/sys/net/ipv4/ip_forward
3. iptables -I FORWARD -j NFQUEUE –queue-num 0
4. then ran the arp spoof program
5. then ran the dns spoof program which I did not get any output back saying “Spoofing target”
6. then I typed ping -c 1 http://www.vulnweb.com which returned it’s IP address not what its suppose to be when spoofed
Here is the code but I believe you saw it.
https://pastebin.com/dLvpPzHQ