[root@localhost ~]# service iptables restart
iptables:将链设置为政策 ACCEPT:filter                    [确定]
iptables:清除防火墙规则:                                 [确定]
iptables:正在卸载模块:                                   [确定]
iptables:应用防火墙规则:iptables-restore v1.4.7: Couldn't load match `-udp':/lib64/xtables/libipt_-udp.so: cannot open shared object file: No such file or directory

Error occurred at line: 14
Try `iptables-restore -h' or 'iptables-restore --help' for more information.               [失败]
解决办法
[root@localhost~]#iptables -N RH-Firewall-1-INPUT

[root@localhost~]# service iptables save

编辑 /etc/sysconfig/iptables
[root@localhost~]#vim /etc/sysconfig/iptables
添加    -ARH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 3690 -j ACCEPT
再重新启动 3690 端口
[root@localhost~]# service iptables restart
 
启动后显示正常
iptables 将链设置为政策 ACCEPT filter                    [ 确定 ]
iptables 清除防火墙规则                                         [ 确定 ]
iptables 正在卸载模块                                             [ 确定 ]

iptables应用防火墙规则                                        [确定]