我有一个NFS服务器,A,共享一个文件夹. B正在安装文件夹. B也在分享该文件夹.但是C无法安装它. C上的错误是：

mount.nfs: 192.168.0.1:/export/myfolder Failed,reason given by server: Permission denied

在B上,/ var / log / messages中的错误是

Aug 17 15:21:21 B mountd[26140]: authenticated mount request from 192.168.0.200:1010 for /export/myfolder (/export/myfolder)

Aug 17 15:21:21 B mountd[26140]: Cannot export /export/myfolder,possibly unsupported filesystem or fsid= required

C上的/ etc / fstab：

192.168.0.1:/export/myfolder /mnt/myfolder nfs defaults,nodev,rsize=32768,wsize=32768,nfsvers=3 0 0

B上的/ etc / exports：

/export/myfolder 192.168.0.0/24(sync,rw,no_root_squash,fsid=200908180957)

我已经将fsid参数添加到导出中,但仍然会出现同样的问题,