将当前iptables的配置写入保存到/etc/sysconfig/iptables
/etc/init.d/iptables sava
修改iptables配置：
vi /etc/sysconfig/iptables
在适当位置增加下面红色的三行，然后重启iptables即可。（30612 是容器对外提供服务的端口）
-A FORWARD -i docker0 -o docker0 -j ACCEPT
-A Docker -d 172.17.0.10/32 ! -i docker0 -o docker0 -p tcp -m tcp --dport 9000 -j ACCEPT
-A DOCKER -d 172.17.0.117/32 ! -i docker0 -o docker0 -p tcp -m tcp --dport 8080 -j ACCEPT
-A DOCKER -d 172.17.0.7/32 ! -i docker0 -o docker0 -p tcp -m tcp --dport 32095 -j ACCEPT
-A DOCKER -d 172.17.0.7/32 ! -i docker0 -o docker0 -p tcp -m tcp --dport 30612 -j ACCEPT
COMMIT
# Completed on Thu Mar 3 13:34:42 2016
# Generated by iptables-save v1.4.7 on Thu Mar 3 13:34:42 2016
*nat
:PREROUTING ACCEPT [267:19881]
:POSTROUTING ACCEPT [8:480]
:OUTPUT ACCEPT [8:480]
:DOCKER - [0:0]
-A PREROUTING -p tcp -m tcp --dport 32095 -j DNAT --to-destination 172.17.0.7:32095
-A PREROUTING -m addrtype --dst-type LOCAL -j DOCKER
-A POSTROUTING -s 172.17.0.0/16 ! -o docker0 -j MASQUERADE
-A POSTROUTING -s 172.17.0.10/32 -d 172.17.0.10/32 -p tcp -m tcp --dport 9000 -j MASQUERADE
-A POSTROUTING -s 172.17.0.117/32 -d 172.17.0.117/32 -p tcp -m tcp --dport 8080 -j MASQUERADE
-A POSTROUTING -s 172.17.0.7/32 -d 172.17.0.7/32 -p tcp -m tcp --dport 32095 -j MASQUERADE
-A POSTROUTING -s 172.17.0.7/32 -d 172.17.0.7/32 -p tcp -m tcp --dport 30612 -j MASQUERADE
-A OUTPUT ! -d 127.0.0.0/8 -m addrtype --dst-type LOCAL -j DOCKER
-A DOCKER ! -i docker0 -p tcp -m tcp --dport 9000 -j DNAT --to-destination 172.17.0.10:9000
-A DOCKER ! -i docker0 -p tcp -m tcp --dport 54321 -j DNAT --to-destination 172.17.0.117:8080
-A DOCKER ! -i docker0 -p tcp -m tcp --dport 32095 -j DNAT --to-destination 172.17.0.7:32095
-A DOCKER ! -i docker0 -p tcp -m tcp --dport 30612 -j DNAT --to-destination 172.17.0.7:30612
COMMIT
# Completed on Thu Mar 3 13:34:42 2016