Fedora 18/19及以上关闭防火墙

fedora17及以前的版本关闭防火墙用systemctl stop iptables.service即可,其他linux版本用service stop iptables

fedora18以上用一个名叫firewalld的玩意，所以需要：

systemctl stop firewalld.service

有必要的话就

systemctl disable firewalld.service

难怪配置的samba不通，mount -v -t nfs也报 mount.nfs: mount(2): No route to host

参考：http://www.chesterproductions.net.nz/blogs/it/sysadmin/changing-back-to-iptables-in-fedora-18/616/