root@NAS:~# iptables -L chain-name -n -v
iptables: No chain/target/match by that name.
root@NAS:~# iptables -L -n
Chain INPUT (policy ACCEPT)
target     prot opt source               destination

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination
root@NAS:~#