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防火墙的问题
查看防火墙命令：chkconfig --list | grep -i iptables
关闭防火墙命令：/sbin/service iptables stop

启动防火墙命令：??/sbin/service iptables???start ?

[root@etl01 bin]#?./shutdown.sh???????????????????????? ======shut down tomcat
Using CATALINA_BASE:?? /java/apache-tomcat-6.0.24
Using CATALINA_HOME:?? /java/apache-tomcat-6.0.24
Using CATALINA_TMPDIR: /java/apache-tomcat-6.0.24/temp
Using JRE_HOME:??????? /usr/java/jdk1.6.0_22
Using CLASSPATH:?????? /java/apache-tomcat-6.0.24/bin/bootstrap.jar
[root@etl01 bin]#?./startup.sh????????????????????????????? ======start tomcat
Using CATALINA_BASE:?? /java/apache-tomcat-6.0.24
Using CATALINA_HOME:?? /java/apache-tomcat-6.0.24
Using CATALINA_TMPDIR: /java/apache-tomcat-6.0.24/temp
Using JRE_HOME:??????? /usr/java/jdk1.6.0_22
Using CLASSPATH:?????? /java/apache-tomcat-6.0.24/bin/bootstrap.jar
[root@etl01 bin]#?chkconfig --list | grep -i iptables? ====check fire wall
iptables??????? 0:off?? 1:off?? 2:on??? 3:on??? 4:on??? 5:on??? 6:off
[root@etl01 bin]#?/sbin/service iptables stop?????????? ====stop fire wall
Flushing firewall rules: [? OK? ]
Setting chains to policy ACCEPT: nat filter [? OK? ]
Unloading iptables modules: [? OK? ]

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原文地址：http://blog.csdn.net/william_zheng2010/article/details/6157296