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How to connect target and host

I recently receive my DM816x/C6A816x/AM389x Evaluation module.

I followed everything but it is impossible to mount a folder on my target. First i installed nfs-server package on my host, then i updated the /etc/exports file with:

/home/user/targetfs *(rw,nohide,insecure,no-subtree-check,async,no-root-squash)

Then i started nfs-kernel-server with cmd:

/etc/init.d/nfs-kernel-server stop the start

Server looked good: rpcinfo -p answers nfsd OK

Then i started the target, i logged in root:

My first tries with

mount -t nfs host-IP:/targetfs /targetfs

respond wrong fs type, bad option, bad super block...

On this forum i found a useful tip to solve this matter, i tried

busybox mount -o nolock -t nfs host-IP:/targetfs /targetfs

but i still have an error !!! this time the error is failed, reason given by server: permission denied

I don't understand what happens my server is full open to every ip address. Have you any information to give me to solve this problem ?


Thx