CentOS：iptablesの設定内容を確認する

iptablesの現在の設定内容を確認するには、 iptablesコマンドのオプション -L を使用します。
これで今の設定内容を確認できます。

# iptables -L
Chain INPUT (policy DROP)
target     prot opt source               destination
ACCEPT     all  --  anywhere             anywhere
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:ftp-data
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:ftp
ACCEPT     tcp  --  anywhere             anywhere            tcp dpts:itap-ddtp:10150
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:10022
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:smtp
ACCEPT     udp  --  anywhere             anywhere            udp dpt:smtp
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:domain
ACCEPT     udp  --  anywhere             anywhere            udp dpt:domain
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:submission
ACCEPT     udp  --  anywhere             anywhere            udp dpt:submission
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:pop3
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:imap
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:snmp
ACCEPT     udp  --  anywhere             anywhere            udp dpt:snmp
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:snmptrap
ACCEPT     udp  --  anywhere             anywhere            udp dpt:snmptrap
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:http
ACCEPT     all  --  anywhere             anywhere            state RELATED,ESTABLISHED

Chain FORWARD (policy DROP)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination

[対象]
CentOS 5.x
CentOS 6.x
iptables 1.4.x