1、查看防火墙状态，哪些端口开放了
/etc/init.d/iptables status
2、配置防火墙
vi /etc/sysconfig/iptables ###################################### # Firewall configuration written by system-config-firewall
# Manual customization of this file is not recommended.
*filter
:INPUT ACCEPT [:]
:FORWARD ACCEPT [:]
:OUTPUT ACCEPT [:]
-A INPUT -m state –state ESTABLISHED,RELATED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -m state –state NEW -m tcp -p tcp –dport -j ACCEPT
-A INPUT -m state –state NEW -m tcp -p tcp –dport -j ACCEPT
-A INPUT -m state –state NEW -m tcp -p tcp –dport 8080 -j ACCEPT
-A INPUT -j REJECT –reject-with icmp-host-prohibited
-A FORWARD -j REJECT –reject-with icmp-host-prohibited
COMMIT
#####################################
#最后重启防火墙使配置生效
/etc/init.d/iptables restart