On 3/11/2017 00:24, houlinfei wrote: > hi Kinglong: > There has another problem about client mount using nfs4.My server system is ubuntu 14.04. nfs-kernel-server version is 1.3.4.My client system is ubuntu12.04.nfs-common version is 1.2.5.Then i mount the directory using nfs4.But it return "mount.nfs: access denied by server while mounting …".When i mount using nfs3,it's ok.Do you know why? Can you show me more information about the exports and your mount command line? # cat /etc/exports # mount ..... thanks, Kinglong Mee -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html