hi, this is my /etc/exports

/home/Share/nocrypt 192.168.1.80(rw,sync,no_subtree_check)
/home/Share/crypt 192.168.1.80(rw,sync,no_subtree_check)
/home/Share/cryptc 192.168.1.80(rw,sync,no_subtree_check)

this is what i done before:

mkdir /home/Share/nocrypt
mkdir /home/Share/crypt
mkdir /home/Share/cryptc

mount -t ecryptfs /home/Share/crypt/ /home/Share/cryptc

i can see and work from nfs client on:
mkdir /home/Share/nocrypt
mkdir /home/Share/crypt (i see crypted files)

but it's impossible to connect the /home/Share/cryptc that is the decripted folder mounted containing decripted files.

Could you please help?

The NFS client and server are on same machine, aren't they? You are testing NFS server, aren't you?

client and server are not the same machine, I'm trying to export an encrypted folder via nfs, not encrypted folders working, encrypted folder not

any ideas?

What's your Linux distribution? It look like mount command is wrong, no password and no encryption algorithm.

it's a debian 8 x64

after mount -t ecryptfs /home/Share/crypt/ /home/Share/cryptc the system ask some questions to answer including the password and algorithm, i can guarantee the encryption works perfectly, the only problem is the nfs export of the decrypted folder, seems kind of locked or something

There are two methods to mount ecryptfs file system, with config file and raw mount.
Raw mount is like following.
mount -i -t ecryptfs ~/.secret ~/secret -o ecryptfs_sig=7c5d3dd8a1b49db0,ecryptfs_fnek_sig=7c5d3dd8a1b49db0,ecryptfs_cipher=aes,ecryptfs_key_by tes=32,ecryptfs_unlink_sigs

You need test ecryptfs on NFS server at first. On NFS server, is everything fine? If mount, you can see plain data. And after unmount, encrypted data show up.

the mount of ecryptfs works perfectly, if i mount i can see the plain data, if unmount i see encrypted data, the ONLY problem is NFS export, i can not export the mounted encrypted folder, i mean from NFS client i can see folder only if not mounted in ecryptfs, if i mount ecryptfs folder in nfs server seems i can not exprt it

Following is example export and client mount. It use NFS v4.

/etc/exports

/exports/user1 192.168.178.20(rw,sync,fsid=0,crossmnt,no_subtree_check)
/exports/user1/data1 192.168.178.20(rw,sync,no_subtree_check)

client command to mount data1:

sudo mount.nfs4 192.168.178.10:/data1 /fs_data -o soft,intr,rsize=32768,wsize=32768