Configuring Unix/Linux (NFS) Sharing
To support the default sharing protocol of Unix and Linux machine, you need to set up NFS. Click Services > NFS and check the Enable option in the upper-right corner (shown in Figure 3).
Figure 3 The NFS page of the FreeNAS web GUI
If you plan to have more than four people connecting to shares on FreeNAS using this protocol, you can increase the number of servers. However, it's recommended that you only have up to six users/servers at one time.
When you're done, click Save and Restart.
Next you can specify which folders you want to share using this protocol. Click the Shares tab. Then browse to the desired folder to insert the path.
Be careful with the Map All Users to Root option; only enable it when you fully trust the users.
For the Authorised Network field, enter the IP address of your router and change it to the correct entry. Change the other settings as necessary and click Add.