root@OpenWrt:~# iptables --list
Chain INPUT (policy DROP)
target     prot opt source               destination         
DROP       all  --  anywhere             anywhere            state INVALID 
ACCEPT     all  --  anywhere             anywhere            state RELATED,ESTABLISHED 
DROP       tcp  --  anywhere             anywhere            tcp option=!2 flags:SYN,RST,ACK/SYN 
ACCEPT     all  --  anywhere             anywhere            
ACCEPT     icmp --  anywhere             anywhere            
ACCEPT     gre  --  anywhere             anywhere            
input_rule  all  --  anywhere             anywhere            
REJECT     tcp  --  anywhere             anywhere            reject-with tcp-reset 
REJECT     all  --  anywhere             anywhere            reject-with icmp-port-unreachable 

Chain FORWARD (policy DROP)
target     prot opt source               destination         
DROP       all  --  anywhere             anywhere            state INVALID 
ACCEPT     all  --  anywhere             anywhere            state RELATED,ESTABLISHED 
TCPMSS     tcp  --  anywhere             anywhere            tcp flags:SYN,RST/SYN TCPMSS clamp to PMTU 
ACCEPT     all  --  anywhere             anywhere            
ACCEPT     all  --  anywhere             anywhere            
forwarding_rule  all  --  anywhere             anywhere            

Chain OUTPUT (policy DROP)
target     prot opt source               destination         
DROP       all  --  anywhere             anywhere            state INVALID 
ACCEPT     all  --  anywhere             anywhere            state RELATED,ESTABLISHED 
ACCEPT     all  --  anywhere             anywhere            
output_rule  all  --  anywhere             anywhere            
REJECT     tcp  --  anywhere             anywhere            reject-with tcp-reset 
REJECT     all  --  anywhere             anywhere            reject-with icmp-port-unreachable 

Chain forwarding_rule (1 references)
target     prot opt source               destination         

Chain input_rule (1 references)
target     prot opt source               destination         

Chain output_rule (1 references)
target     prot opt source               destination