$ sudo iptables --L --n
Chain INPUT (policy ACCEPT)
target      prot opt source       destination
f2b-default tcp  --  0.0.0.0/0    0.0.0.0/0    multiport dports 22
Chain FORWARD (policy ACCEPT)
target    prot opt source         destination
Chain OUTPUT (policy ACCEPT)
target    prot opt source         destination
Chain f2b-default (1 references)
target    prot opt source         destination
RETURN    all  --  0.0.0.0/0      0.0.0.0/0