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....

222 
 
 
 
 
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...

223 
 
 
 
 
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...

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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.  

225 
 
 
 
 
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...

226 
 
 
 
 
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...

227 
 
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...

228 
 
 
 
 
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,...

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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.  

230 
 
 
 
 
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