centos

[root@localhost network-scripts]# iptables -L
Chain INPUT (policy ACCEPT)
target     prot opt source               destination
ACCEPT     all  --  anywhere             anywhere            state RELATED,ESTABLISHED
ACCEPT     icmp --  anywhere             anywhere            icmp any
ACCEPT     tcp  --  anywhere             75-149-115-49-Memphis.hfc.comcastbusiness.net tcp dpt:ssh
ACCEPT     all  --  anywhere             anywhere
ACCEPT     all  --  anywhere             anywhere
DROP       tcp  --  anywhere             anywhere            tcp dpt:smtp
ACCEPT     all  --  anywhere             anywhere
REJECT     all  --  anywhere             anywhere            reject-with icmp-host-prohibited

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination
[root@localhost network-scripts]#