问题 请问高手如何定制防火墙设置？

Veldrin

装了lmule，README中有这么几句
* If you are behind a firewall or router, be sure that ports 4662 (TCP)
and 4672 (UDP) are unblocked, or you will *always* receive a low ID.

似乎可以通过修改防火墙的配置文件来容许4662端口和4672端口
搜索redhat-config-securitylevel文件
结果搜到好几个
/etc/sysconfig/redhat-config-securitylevel
/etc/pam.d/redhat-config-securitylevel
/etc/security/console.apps/redhat-config-securitylevel
/usr/bin/redhat-config-securitylevel
/usr/share/redhat-config-securitylevel
应该是修改哪一个呢？具体应该如何修改？谢谢指点