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 > RADIUS Clients. Up to 10 RADIUS clients are supported. Click Create a 
Client. 
3. Enter the client information and click Apply. 
4. The clients are shown on the list.  
5. Create RADIUS users and their password in Control Panel > Applications > RADIUS 
Server > RADIUS Users. The users will be authenticated when trying to access the 
network through RADIUS clients. The maximum number of RADIUS users the NAS 
supports is the same as the maximum number of local NAS users supported. See the 
chapter on Users for details. Click Create a User. 
6. Enter the username and password. The username only supports letters (a-z and A-Z) 
and numbers (0-9). The password must be 8-32 characters in length.  
						

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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.  
						

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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 NAS as a 
Syslog server, enter the NAS IP as the Syslog server IP on the Syslog clients to receive 
Syslog messages from them. 
Log Settings: Specify the maximum log size (1-100 MB) of Syslog messages, the 
location (NAS shared folder) where the logs will be saved, and the file name. Once the 
logs have reached their maximum size, the log file will be automatically archived and 
renamed with the archive date as MyLogFile_yyyy_mm_dd, for example 
MyLogFile_2011_12_31. If multiple log files are archived on the same day, the file will be 
named as MyLogFile_yyyy_mm_dd.[number]. For example, MyLogFile_2011_12_31.1, 
MyLogFile_2011_12_31.2, and so on. Click Apply to save the settings. 
Email Notification: The NAS supports sending email alerts to up to 2 dedicated email 
addresses (configured in System Settings > Notification > Alert Notification) when  
						

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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 received. 
Alert 1 Alert: immediate action required. 
Alert emails will be sent when Syslog messages of levels 
1-4 are received. 
Crit 2 Critical: critical conditions. 
Alert emails will be sent when Syslog messages of levels 
2-4 are received. 
Err 3 Error: error conditions. 
Alert emails will be sent when Syslog messages of levels 
3-4 are received. 
Warning 4 Warning: warning conditions. 
Alert emails will be sent when Syslog messages of level 4 
are received. 
 
Filter Settings 
 
This feature should only be operated by administrators who are familiar with Syslog filters. 
Follow these steps to create Syslog filters for the NAS to receive Syslog messages that 
match the criteria: 
1. Click Add a Filter. 
2. Define the filter settings and click Add. To edit the filters or to manually add filters, 
click Manual Edit and modify the contents in the dialog. Click Apply to save the filter. 
3. The filters will be shown on the list. The NAS will only receive Syslog messages that 
match the filters which are in use. 
 
 
  
						

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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 file transfer is 69 and you should only change it if necessary. 
3. Specify a folder on the NAS as the root directory of the TFTP server. 
4. Enable TFTP Logging: Enable this option and specify the directory to save the TFTP log 
file (opentftpd.log.) It is recommended to view the log file using Microsoft Excel or 
WordPad on Windows OS or by TextEdit on Mac OS. 
5. Assign read only or full access to the clients. 
6. Restrict the TFTP client access by specifying the IP address range or select Anywhere to 
allow any TFTP client access. 
7. Click Apply. 
 
  
						

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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 Space Reclaim, to manage your volumes more effectively. To 
double system performance, QNAP offers a number of network accessories that support 
10GbE and 40 GbE transmission speeds, Qtier™ technology and SSD Cache feature that 
capitalize on SSD technologies for auto-tiering and SSD caching. Besides, the QNAP vSphere 
Client plugin, QNAP vSphere Web Client plugin, QNAP Snapshot Agent and QNAP SMI-S 
Provider are available to increase management productivity and efficiency. 
 
Note: Each feature mentioned in this chapter is applicable only to specific models. Please 
refer to each respective section for supported models.  
 
Server Virtualization 
 
The Turbo NAS supports three types of server virtualization applications: VMware vSphere, 
Microsoft Hyper-V and Citrix XenServer. For details on each of the solutions and supported 
models, check here.  
 
VAAI for iSCSI and VAAI for NAS 
 
The Turbo NAS supports VMware VAAI (vStorage APIs for Array Integration) to increase 
operational performance in virtualization environments. With VAAI, data processing is 
offloaded to the Turbo NAS, and standard virtual machine management and deployment can 
be performed more efficiently, consuming less ESXi CPU, memory, and bandwidth resources. 
VAAI includes two parts: 1) VAAI for iSCSI and 2) VAAI for NAS. 
 
VAAI for iSCSI supports the following four features:  
Full Copy (hardware-assisted copy): Processes the full copies of data within the Turbo 
NAS without requiring that the EXSi host reads and writes the data. This feature can 
reduce the loading for ESXi hosts and speed up the cloning process for virtual machines;  
Block Zeroing (hardware-assisted zeroing): Enables Turbo NAS to zero out a large 
number of blocks to speed up the provisioning of virtual machines. This feature can reduce 
the loading for ESXi hosts and increase capacity allocation efficiency for virtual machines;  
						

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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 consumption more accurately, 
avoid out-of-space conditions, increases NAS space utilization and saves IT cost.  
 
VAAI for NAS offers the following three features:  
Full File Clone: Enables the Turbo NAS to copy all data within the NAS without requiring 
that the ESXi host reads and writes the data. This feature can reduce loading for ESXi 
hosts, speeds up the cloning process for virtual machines. 
Extended Statistics: Enables vSphere to query space utilization details for virtual disks 
on QNAP NFS datastores, including the size of a virtual disk and the real space 
consumption of that virtual disk. This feature can report disk space consumption more 
accurately, increase NAS space utilization and save IT cost. 
Reserve Space: Reserves the pre-allocated space of virtual disks (thick provision eager 
zeroed disks) in QNAP NFS datastores. This feature can increase virtual disk read/write 
performance (thin provision disks vs. thick provision disks.) 
 
With the support of VAAI for iSCSI and VAAI for NAS, the Turbo NAS can boost storage 
performance (more than 120 times faster) to create new virtual machines in a virtualized 
environment. For more details on VAAI for iSCSI and VAAI for NAS, check here.  
 
ODX (Offloaded Data Transfer) 
 
The Turbo NAS supports Offloaded Data Transfer (ODX) in Microsoft Windows Server 2012, 
making it a high performance iSCSI storage solution in Hyper-V virtualized environment. 
Supporting ODX, the Turbo NAS can be offloaded with all the copying processes from 
Windows servers. It highly reduces loading of Windows servers and improves the 
performance of copying and moving operations for Windows 2012 hosts using the QNAP 
iSCSI storage. For more details on ODX, check here.  
 
 
 
 
 
 
  
						

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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 here.  
 
SSD Cache 
 
Based on the SSD technology, the SSD cache feature is designed to boost access 
performance of the Turbo NAS. As the name SSD Cache implies, SSD drives need to be 
installed to enable this function. To learn how to set up SSD Cache on the Turbo NAS, check 
here.  
 
Qtier™ Technology 
 
Based on the SSD technology, Qtier is designed to boost access performance of the Turbo 
NAS. Qtier can optimize your data based on the access pattern and then automatically move 
the data to a suitable hard drive. Qtier supports two to three tiers, which can be SSD drives, 
SAS drives or SATA drives. SSD drives are required to enable this function. To learn more 
about Qtier on the Turbo NAS, check here. 
 
QNAP vSphere Client Plugin and vSphere Web Plugin 
 
The QNAP vSphere Client plugin for QNAP Turbo NAS is an interface between ESXi and the 
Turbo NAS. This tool allows system administrators to manage VMware datastores on the 
QNAP Turbo NAS directly from the vSphere Client console and verify the status of all QNAP 
Turbo NAS units. For setup details on vSphere Client,, check here.  
 
QNAP SMI-S Provider  
 
QNAP SMI-S Provider is a required component for the support of System Center Virtual 
Machine Manager (SCVMM 2012 and 2012 R2). With this tool, the Turbo NAS can directly 
communicate with SCVMM 2012, and server management tasks can be facilitated for 
administrators. For detail on QNAP SMI-S Provider, check here.