NFS出错,help!!!

NFS出错,help!!!

NFS出错,help!!!
在Redhat 72下, 当设置好NFS服务器后,在client端mount NFS目录时出错,请大虾们帮帮忙。
在NFS客户端:
出错信息如下:
[root@hsd /]# mount /mnt/local
mount: RPC: Unable to receive; errno = Connection refused

当检查NFS服务器的export目录时如下:
[root@hsd /]# /usr/sbin/showmount -e dev01
mount clntudp_create: RPC: Port mapper failure - RPC: Unable to receive


      
1.portmap 服务没起来,use ntsysv ,or service portmap restart
2.firewall 关掉 ,use lokkit      
服务器端showmount正常,能看见共享目录,但用客户端showmount链接有问题 报错:RPCort mapper failure-RPC unable to receive.我已经启动portmap.#/etc/rc.d/init.d/portmap restart.到底是什么问题?