+++
title = 'Synology NAS: NFS shares'
aliases = '/posts/2023-04-10-synology-nas-nfs-shares'
summary = '''I've done this setup now several times (because I break so
  many things all the time). It is time to write it down...'''
date = '2023-04-10T21:44:18+0200'
# lastmod = ''
categories = [ 'computerstuff' ]
tags = [ 'linux', 'server', 'nfs', 'networking' ]

# showDate = false
# showReadingTime = false
# showWordCount = false
# showPagination = false

# feed_exclude = true
# site_exclude = true

+++

## Create or change the NFS share

First of all edit your shared folder.
<kbd>Control Panel</kbd> → <kbd>Shared Folder</kbd> → <kbd>Edit</kbd> →
<kbd>NFS Permissions</kbd> → <kbd>Create (or Edit)</kbd>.

![path to the settings as mentioned above](01-shared-folders-nas.png)

| Setting        | Value                      |
| :------------- | :------------------------- |
| Hostname or IP | 192.168.10.100 (actual IP) |
| Privilege      | Read/Write                 |
| Squash         | Map all users to admin     |
| Security       | sys                        |

## Change the user and group ids in `/etc/exports`

Now login to the <abbr title="Network Attached Storage">NAS</abbr> with <abbr
title="Secure Shell">SSH</abbr> and open the file `/etc/exports` as the user
root.

The file should look similar to this one:

```
/volume1/video	192.168.10.100(rw,async,no_wdelay,crossmnt,insecure,all_squash,insecure_locks,sec=sys,anonuid=1026,anongid=100)
```

I have the following users on my NAS:

```
uid=1024(admin) gid=100(users) groups=100(users),101(administrators)
uid=1026(dominic) gid=100(users) groups=100(users),101(administrators),1000(nfs-dominic)
uid=1000(nfs-dominic) gid=1000(nfs-dominic) groups=1000(nfs-dominic)
```

Change the parts `anonuid=1026,anongid=100` to your needs.

I do have a personal folder that I change to `anonuid=1000,anongid=1000`
but I leave others (like video) that use `anonuid=1026,anongid=100`
(because I want the internal user on the NAS to use them too).

## Restart NFS Service on your NAS

Whenever you finished your changes to that file, save it and go back to
the control panel on the web interface.

<kbd>Control Panel</kbd> → <kbd>File Services</kbd> → <kbd>NFS</kbd>.

1. Disable NFS service, click <kbd>Apply</kbd>.
2. Enable NFS service, click <kbd>Apply</kbd>.

## Adopt your client

Edit your `fstab` file. Mine looks like this:

```
nas.lan:/volume1/video  /home/dominic/_nas/video  nfs  noauto,users,nodev,async,soft,_netdev,x-systemd.device-timeout=1,x-systemd-idle-timeout=1min,x-systemd.mount-timeout=10,timeo=10,retry=3  0  0
```