iptables scan monitoring with nmap

iptables -F                                 # flush all rules
iptables -I INPUT 1 -s 10.0.0.19 -j ACCEPT  # insert source rule
iptables -I OUTPUT 1 -d 10.0.0.19 -j ACCEPT # insert destination rule

iptables -Z                                 # zero all counters
nmap -sT 10.0.0.19                          # run a basic TCP scan

iptables -nv -L                             # view traffic results as list