QNAP Systems Ts 253 User Guide

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RADIUS Server 
 
The NAS can be configured as a RADIUS (Remote Authentication Dial In User Service) 
server to provide centralized authentication, authorization, accounting management for 
computers to connect and use a network service. 
 
 
To use this feature, follow these steps: 
1. Enable RADIUS Server on the NAS in Control Panel > Applications > RADIUS Server 
> Server Settings. Click Apply. 
2. Add RADIUS clients, such as Wi-Fi access points and VPN, on the NAS in RADIUS 
Server >...

302 
 
7. Specify to grant dial-in access to local NAS users. Enable this option to allow local NAS 
users to access network services via RADIUS clients using their NAS login name and 
password. 
 
Note: The RADIUS server only supports PAP, EAP-TLS/PAP, and EAP-TTLS/PAP 
authentication for local NAS user accounts.  

303 
 
 
 
 
Syslog Server 
 
Configure the NAS as a Syslog server, create Syslog filters and view available Syslog 
messages on this page.  
 
 
Server Settings 
 
Server Settings: To configure the NAS as a Syslog server and allow it to receive Syslog 
messages from clients, enable Syslog Server. Select the protocols (TCP and/or UDP) the 
NAS uses to receive Syslog messages. Specify the port numbers if necessary or use the 
default port number 514. Click Apply to save the settings. After enabling the...

304 
 
the severity of the received Syslog messages match the specified level. To use this 
feature, configure the SMTP server settings in System Settings > Notification > 
SMTP Server. Next, enable email notification and select the severity level in 
Applications > Syslog Server > Server Settings. Click Apply to save the settings. 
Severity Level 
(smallest 
number the 
highest) 
Description 
Emerg 0 Emergency: the system is unusable. 
Alert emails will be sent when Syslog messages of levels 
0-4 are...

305 
 
Button Name Description 
 Enable Enable a filter 
 Disable Disable a filter 
 Edit Edit filter settings 
Delete Delete Delete filters 
 
Syslog Viewer 
 
Use the Syslog viewer to view the available Syslog messages on the NAS. Select to view the 
latest logs or the logs in a particular archived file. Log files can be accessed on the directory 
configured in Syslog Server > Server Settings > Log Settings.  

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TFTP Server 
 
Configure the NAS as a TFTP (Trivial File Transfer Protocol) server for configuration 
management of network devices and remote network booting of computers for system 
imaging or recovery. TFTP is a file transfer protocol with the functionality of a very basic 
form of FTP. TFTP does not provide user authentication and cannot be connected to using a 
standard FTP client. 
 
 
Follow these steps to use this feature: 
1. Select Enable TFTP Server. 
2. The default UDP port for...

307 
 
Note: To set up PXE with your NAS, please use a static IP for your NAS, enable its DHCP 
service and specify the TFTP server IP and name of the boot file in Control Panel > 
Network > click the Edit button next to the LAN port > DHCP server. For more 
details, please refer to the DHCP Server chapter  

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Virtualization 
 
QNAP business-class Turbo NAS is a virtualization-ready storage solution designed to 
optimize your virtualization operations. In addition to the support for VMware vSphere, 
Microsoft Hyper-V and Citrix XenServer, this storage solution includes the cutting edge VAAI 
for iSCSI, VAAI for NAS and ODX (Offloaded Data Transfer) technologies to offload the 
heavy-duty file operations from the servers and flexible volume management approaches, 
such as Thin Provisioning and...

309 
 
Hardware-assisted Locking: Enables granular locking of block storage devices rather 
than locking the entire LUN in SCSI. This feature permits the VMware vSphere 
environment to scale up for more virtual machines and more ESXi hosts without 
performance penalty and boosts efficiency when a single datastore is shared by a number 
of ESXi hosts; 
Thin Provisioning with Space Reclaim: Releases the LUN space when virtual disks are 
deleted or migrated. This feature can report disk space...

310 
 
 
10 GbE and 40 GbE Support 
 
A 10GbE (10 Gigabit Ethernet) and 40 GbE network is essential for businesses that demand 
high bandwidth for virtualization and fast backup and restoration efficiency for an 
ever-growing amount of data. QNAPs 10GbE Turbo NAS series is an affordable and reliable 
storage solution for deploying a 10GbE environment. For detail on 10GbE and 40 GbE 
support, its application, technical specifications (physical interfaces), applications and the 
compatibility list, check...