QNAP Systems Ts 253 User Guide

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NFS Service 
 
To connect to the NAS from Linux, enable the NFS service under NFS. Select “Enable NFS 
v2/v3 Service” for NFS version 2 or 3. Select “Enable NFS v4 Service” for NFS version 4. 
Multiple selections can be selected.    To configure NFS access rights to shared folders on the 
NAS, go to Privilege Settings > Share Folders and click the Access Permission button on 
the Action column. Select NFS host access from the drop-down menu on the top of the 
page and specify the access rights. For either the read/write or read-only option, you 
can specify the IP address or domains that are allowed to connect to the folder by NFS. 
read/write: Allow users to create, read, write, and delete files or folders in the shared 
folder and any subdirectories. 
read-only: Allow users to read files in the shared folder and any subdirectories but they 
are not allowed to write, create, or delete any files. 
 
Connecting to the NAS by NFS 
On Linux, run this command: 
 mount -t nfs :/  
 
For example, if the IP address of your NAS is 192.168.0.1 and you want to link the shared 
folder public under the /mnt/pub directory, use this command: 
 mount -t nfs 192.168.0.1:/public /mnt/pub 
 
Note: You must login as the root user to use the above command. 
 
Login as the user ID you define, you can use the mounted directory to connect to your 
shared files.  
						

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Telnet/SSH 
 
Enable this option to connect to the NAS by Telnet or SSH encrypted connection (only the 
admin account can remotely log in.) Use Telnet or SSH connection clients such PuTTY to 
connect to the NAS. Ensure the specified ports have been opened on the router or firewall. 
 
 
To use SFTP (SSH File Transfer Protocol/Secure File Transfer Protocol), ensure that the 
option "Allow SSH connection" has been enabled. You can click “Edit Access Permission” to 
choose which administrators can access the NAS via SSH connections.  
						

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SNMP Settings 
 
Enable SNMP (Simple Network Management Protocol) on the NAS and enter the trap 
address of the SNMP management stations (SNMP manager) - for example, a PC with SNMP 
software installed. When an event, warning, or error occurs on the NAS, it will report a 
real-time alert to SNMP management stations. 
 
 
The fields are described as below: 
Field Description 
SNMP Trap Level Select information to be sent to the SNMP management stations. 
Trap Address The IP address of the SNMP manager. Specify up to 3 trap 
addresses. 
SNMP MIB (Management 
Information Base) 
The MIB is a type of database in ASCII text format used to manage 
the NAS in the SNMP network. The SNMP manager uses the MIB to 
determine the values or understand the messages sent from the 
agent (NAS) within the network. You can download the MIB and 
view it with any word processor or text editor. 
Community (SNMP V1/V2) An SNMP community string is a text string that acts as a password. 
It is used to authenticate messages that are sent between the  
						

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management station and the NAS. The community string is 
included in every packet that is transmitted between the SNMP 
manager and the SNMP agent. 
SNMP V3 The NAS supports SNMP version 3. Specify the authentication and 
privacy settings if available.  
						

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Service Discovery 
 
Go to Control Panel > Network & File Services > Service Discovery to configure the 
UPnP discovery service and Bonjour.  
 
 
UPnP Discovery Service 
 
When a UPnP device is added to the network, the UPnP discovery protocol allows the device 
to advertise its services to the network control points. By enabling UPnP Discovery Service, 
the NAS can be discovered by any systems that support UPnP. 
 
Bonjour 
 
By using Bonjour, your Mac will automatically discover network services (such as FTP) 
running on the NAS without needing to enter IP addresses or configuring DNS servers. 
 
Note: You must activate the services on their setup pages and then enable them in this 
section so that the NAS can advertise them using Bonjour.  
						

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FTP 
 
Go to Control Panel > Network & File Services > FTP to Configure the FTP server. 
 
 
FTP Service 
 
When you enable the FTP service, you can specify the port number and the maximum 
number of users that are allowed to connect to the NAS by FTP at the same time. To use the 
FTP service of the NAS, enable this function. Open a browser and enter ftp://NAS IP:Port. 
Enter the username and the password to login the FTP service. 
Protocol Type: Select to use standard FTP connection or SSL/TLS encrypted FTP. Select 
the correct protocol type in your client FTP software to ensure successful connection. 
Multiple selections can be selected.  
Port number: Specify the port number of the FTP service.  
Unicode Support: Toggles Unicode support. The default setting is No. If your FTP client 
does not support Unicode, it is recommended to disable this option and select the 
specified language in "Control Panel” > “General Settings" > "Codepage" so that the file 
and folder names can be correctly displayed. If your FTP client supports Unicode, enable 
this option for both your client and NAS. 
Enable Anonymous: Enable this option to allow anonymous access to the NAS by FTP. 
Anonymous users can connect to files and folders which are open for public access. If 
this option is disabled, users must enter an authorized username and password to 
connect to the NAS. 
Connection: Enter the maximum number of allowed FTP connections for the NAS and a 
single account and check Enable FTP transfer limitation to specify the maximum upload 
and download rates.   
						

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Online Users: Check details of the current FTP connections, including the type of 
connection, login date, login time, user account, source IP, and computer name. 
 
Note: The maximum number of FTP connections varies based on the size of RAM installed 
on the NAS:  
If the NAS memory =< 1 GB, the maximum is 256. 
If the NAS memory = 2 GB, the maximum is 512. 
If the NAS memory >= 3 GB, the maximum is 1024. 
 
Advanced 
 
Passive FTP Port Range: You can use the default port range (55536-56559) or specify 
a port range larger than 1023. When using this function, make sure you have opened the 
ports on your router or firewall.  
Respond with external IP address for passive FTP connection request: Enable 
this function when a passive FTP connection is in use, the FTP server (NAS) is behind a 
router, and a remote computer cannot connect to the FTP server over the WAN. When 
this is enabled, the NAS replies with the specified IP address or automatically detects an 
external IP address so that the remote computer is able to connect to the FTP server. 
Set root directory: After enabling this function and selecting a root directory, only that 
directory will be visible to FTP users. Otherwise, all of the shared folders will be visible.  
						

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Network Recycle Bin 
 
The Network Recycle Bin retains files deleted on the NAS. Within each shared folder, a 
dedicated folder with the name @Recycle is created after the initial QTS installation. Specify 
the number of days (1-180) to retain files and the daily time. You can also specify the file 
extensions to be excluded from the bin. This feature only supports file deletion via Samba, 
AFP, FTP and File Station. 
 
 
Using Network Recycle Bin 
 
To delete all the files in the bin, click Empty All Network Recycle Bin. 
To recover deleted files from the Network Recycle Bin, right click on the files in the 
@Recycle folder and select RECOVER.  
To permanently delete a file in the recycle bin, right click on the file in the @Recycle 
folder and select Del (from recycle). 
To empty the recycle bin for an individual shared folder, right click inside the recycle bin 
and select Empty Recycle Bin.  
 
Restricting Access to Network Recycle Bin 
The Network Recycle Bin can be restricted to administrators usage by going to Control 
Panel > Privilege Settings > Shared Folders. Click Property under Action for the 
shared folder to be configured and check Restrict the access of Recycle Bin to 
administrators only for now. 
 
  
						

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Caution: All of the files in network recycle bins will be permanently deleted when files 
are deleted in @Recycle on the network share or when you click Empty All Network 
Recycle Bins. The Network Recycle Bin feature is not supported for USB/eSATA external storage 
devices and virtual disks.  
						

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Business Applications 
 
The following NAS functions are designed to meet business needs.  
 
 
For setup details, refer to the following links: 
Antivirus 
Backup Station 
File Station 
iSCSI Service 
LDAP Server 
QVPN 
SQL Server 
NTP Service 
RADIUS Server 
Syslog Server 
TFTP Server 
Virtualization 
Web_Server