Chain INPUT (policy ACCEPT)
num  target     prot opt source               destination         
1    ACCEPT     all  --  anywhere             anywhere            
2    ACCEPT     all  --  anywhere             anywhere            
3    ACCEPT     all  --  anywhere             anywhere             ctstate RELATED,ESTABLISHED
4    DROP       all  --  anywhere             anywhere             ctstate INVALID
5    DROP       all  --  15.15.15.51          anywhere            
6    ACCEPT     tcp  --  15.15.15.0/24        anywhere             tcp dpt:ssh ctstate NEW,ESTABLISHED

Chain FORWARD (policy ACCEPT)
num  target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)
num  target     prot opt source               destination         
1    ACCEPT     all  --  anywhere             anywhere            
2    ACCEPT     all  --  anywhere             anywhere             ctstate ESTABLISHED
3    ACCEPT     tcp  --  anywhere             anywhere             tcp spt:ssh ctstate ESTABLISHED
