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External design


Firmware updating

Web-interface review

Command line interface




There are three leaders in the Russian market producing network attached storages intended for different application areas: Synology, Thecus and QNAP. ASUS company which is a famous manufacturer of components for PCs, laptops and network equipment recently began its promotion within this market. Its first test run - NAS-M25 and Home Server TS Mini – were presented in CeBit 2010 international exhibition. And now we pay attention of our readers to review and trial of the first one - ASUS NAS-M25. Let’s get started!

External design

ASUS NAS-M25 has a white plastic case with rounded corners and slightly projecting lower and upper decks. Geometrical parameters of the device are 210*128*105 mm. Upper and side panels are of nothing peculiar.

Manufacturer label, USB connector, ON/OFF button as well as USB-drive data copy button, device status and disks’ and network activity light indicators are located on the front panel. A front cover becomes a little bit loose in a while and we can notice some free-play by opening/closing. Of course, it doesn’t affect functioning of the device, but general impression gets worse.

The rear panel equips two USB-connectors and one power connector, Gigabit Ethernet port, and Reset sunk button used to reset user’s settings. It should be also mentioned that NAS-M25 has an external power adapter, applying +5 and +12 V voltage by 3 А current. The power adapter itself is equipped with standard IEC 320 C14 socket, allowing connection to UPS without any problems. A 40 mm fan for hard disks cooling is also located here. To our opinion, the fan of this size is a weak point, as it will cause noticeable noise increase in a while.

There are four white rubber legs for device installation on a table on the bottom side of the storage. Rack mounting of NAS-M25 without special shelves is not provided. Short description of the model is represented on a label in the central part of the bottom side. Here is also a latch allowing dismantling of a front panel of the device.

We finished a brief inspection of NAS-M25 from the outside, let’s look inside now.


ASUS NAS-M25 network attached storage is based on two dark boards made of dark textolite, and one of them is just an adapter for hard disk connection. Two connectors PCI-E are located on the main board and are used for connection.

Main elements on the second board are located from the one side. 1 GHz Marvell 88F6-B1A2 is used as a processing unit. It belongs to Feroceon series which is used very often even by competitors, e.g. QNAP and Synology. NAS-M25 is equipped with 128 MB of Samsung K9F1G08U0B-PCB0 flash-memory and 512 MB RAM - DDR2 (four Samsung chips K4T1G084QE 128 MB each). USB2.0 controller is a NEC chip 720114. Gigabit Ethernet controller functions are performed here by Marvell Alaska 88E1116R, and transformer functions – by Delta ( LFE9203.

We have finished examining hardware, let’s consider storage software features.

Firmware updating

The article had been already finished, when we received a new firmware version from the manufacturer, that’s why we decided to introduce simple procedure of firmware updating implemented by means of Firmware item in Maintenance group to our users. It is required just to specify the file with new system image and then to click an Apply button.

The whole updating procedure takes up not more than five minutes and differs from the similar processes for ASUS equipment just by the size of file with a firmware image; in our case it occupies 18.9 Mbyte.

The only thing we should remember is to reset user settings and to configure ASUS NAS-M25 again after firmware updating.

Web-interface review

ASUS NAS-M25 network attached storage has IP-address, which should be used for connection via any browser. Default login and password are admin and admin. Access to web-interface is allowed in English, Czech, German, French, Italian, Polish, Russian and Chinese.

The only buttons are available for users: Configuration Center and Twonky UPnP Server. An installation of additional packages extends NAS functionality. Let’s review features of every of them in brief.

Device operation parameters modification is performed by Configuration Center button. Menu located from the left side allows setting access.

Disk group contains Disk Status, Disk Configuration, Disk Utilities sub-items. Power Management is available in the Maintenance group. The first sub-item allows obtaining data regarding mounted hard disks and RAID parameters. Selection of the RAID and the file system type is performed in Disk Configuration sub-item. It is possible to determine here, if the device must automatically restore data in case of one hard disk fault in RAID1.

Scanning and reformatting of disks are available in Disk Utilities sub-item; and in Power Management sub-item it is possible to indicate inactivity period, when NAS-M25 would turn off hard disks for energy saving.

Server group contains the following sub-items: Samba Server, FTP Server, DHCP Server, NFS Server, iTunes Server and Printer Server, allowing configuring of corresponding services.

ASUS NAS-M25 enables operation with Jumbo-frames, their size is set in LAN section of Networks group. It is also possible to make the device receive IP-parameters automatically, or to set them manually.

The second Network Group item of the same group allows changing of NAS-M25 parameters for interaction with local group or Active Directory.

Account group sub-items provide controls of users, their groups, access rights and restrictions.

Maintenance group contains common routine features of time synchronization, saving/restoring/resetting of user’s settings, administrator password changing, upgrading, system overheating alert settings, etc.

The Information about system and hard drive temperature, drive status, IP-parameters, printer condition; as well as log data are collected in Status sub-item.

Except services available on default and controlled by Configuration Center item, ASUS NAS-M25 allows additional setting of bump pack in IPKG item. By the time the article was written only one phpMyAdmin extension could be set in automatic mode. To set packages automatically it is necessary to connect storage to the internet, select the required extension package and click on Install key.

If installation was successful, corresponding symbol will be displayed in the Status field.

If storage Internet access is denied, it is possible to install additional packages manually by selecting the corresponding file.

For the application we installed there appeared a new icon on the main page, which allows moving to phpMyAdmin settings. Studying all the features provided by package falls far beyond the scope of our article, that’s why we surely will not deepen into phpMyAdmin web-interface. We’ll just note that to get access to package parameters, we have to enter login and password, which are specified in the status file located in Volume_1\.ipkg-modules\tmp\ipkg\packages\ipkg catalogue, and are equal on default to root and phpMyAdmin, correspondingly.

The firmware includes bump packs for manual installation. Installation procedure itself is simple - you need just to specify the required file in Software Add-ins item of Maintenance group and click an Apply button.

One more not least interesting web-interface section is Download Master, which allows to start loading files via HTTP, FTP or BT protocols by means of web-interface itself, which is not applying additional software unlike previous ASUS products. By the moment when the article about NAS-M25 had been written, such software was even not available for users, and we don’t know, whether it will be available at all. We’ve installed a utility package (version 4089) for RT-N16 as an experiment and loaded Download Master from this package, as we had also ASUS RT-N16 connected to our test network at that moment. A discovery module, which is a part of DM, detected both devices. We connected to NAS-M25, though a manufacturer strongly recommend against it.

We successfully added downloading task via Download Master utility, set up on a test PC, and, passing on DM, integrated to web-interface, satisfied ourselves in existence and completion of preset downloading.

We’d like to mention also that the storage could be also detected in the network via Device Discovery program, which is a part of utilities developed for other network devices of ASUS company.

Herewith we finish our brief review of ASUS NAS-M25 web-interface and proceed to testing.

Command line interface

ASUS NAS-M25 doesn’t provide access to its settings via Telnet protocol, but there is just one shag – this kind of access is available for several minutes immediately after loading. This access is no more allowed either when there is activity via telnet protocol or without it. Login and password are not required when addressing to the storage. We think that this fact facilitate hacking for a probable intruder. Of course we tried to find out why the access via telnet protocol is interrupted. The problem has a simple explanation, during NAS-M25 loading product_test process with “short_terms_telnet 180” parameters is starting. In three minutes this process will kill telnet daemon. It is possible to detect PID of this process in ps command output. Then it is necessary to kill it by means of kill pid command to continue telnet-access.

# ps
1 root 1948 S init
2 root 0 SW< [kthreadd]
3 root 0 SWN [ksoftirqd/0]
4 root 0 SW< [events/0]
5 root 0 SW< [khelper]
40 root 0 SW< [kblockd/0]
43 root 0 SW< [khubd]
57 root 0 SW [crypto]
58 root 0 SW [crypto_ret]
63 root 0 SW [pdflush]
64 root 0 SW [pdflush]
65 root 0 SW< [kswapd0]
66 root 0 SW< [aio/0]
221 root 0 SW< [scsi_eh_0]
222 root 0 SW< [scsi_eh_1]
241 root 0 SW< [mtdblockd]
296 root 0 SW< [kcryptd/0]
302 root 0 SWN [jffs2_gcd_mtd4]
313 root 0 SW< [loop0]
329 root 2332 S xmldb -n config
353 root 1504 S dhcp_handler
425 root 0 SW< [kjournald]
432 root 0 SW< [md0_raid1]
453 root 2356 S polling_disks
454 root 1960 S polling_smart
460 root 18828 S logdb
495 root 1680 S fancontrold
497 root 1508 S ubutton
503 root 1948 S sh /var/run/
513 root 1844 S op_server -f lan1 -i 0 19 0
536 root 7900 S mathopd -f /var/tmp/httpd.cfg
554 root 1940 S matrixtunnel -A /etc/privkey.pem -p /etc/privkey.key
564 root 1628 S /usr/sbin/usbd -p 3 -n 3 -f 2
621 root 2192 S crond
646 root 11436 S smbd -D
655 root 11436 S smbd -D
656 root 8276 S nmbd -D
664 root 1760 S mDNSResponderPosix -b -f /etc/mdnsresponder.conf
711 root 1952 R telnetd -l /bin/ash
717 root 2868 S infosvr eth0
718 root 2836 S btnsetup
719 root 1952 S -/bin/sh
721 root 1720 S /web/TwonkyVision/twonkymedia -D -inifile /system/cfg
722 root 28128 S /web/TwonkyVision/twonkymediaserver -D -inifile /syst
1643 root 1560 S product_test short_terms_telnet 180
23941 root 1952 S /bin/ash
23954 root 2024 R ps

Let’s consider options of the storage command line in detail. As usually Busybox is installed in the system for ASUS network devices.

# busybox
BusyBox v1.12.3 (2010-08-25 07:08:55 CST) multi-call binary
Copyright (C) 1998-2008 Erik Andersen, Rob Landley, Denys Vlasenko
and others. Licensed under GPLv2.
See source distribution for full notice.
Usage: busybox [function] [arguments]...
or: function [arguments]...
BusyBox is a multi-call binary that combines many common Unix
utilities into a single executable. Most people will create a
link to busybox for each function they wish to use and BusyBox
will act like whatever it was invoked as!
Currently defined functions:
arping, ash, awk, basename, brctl, cat, chgrp, chmod, chown, cp, crond, crontab, date, dd, depmod, df,
dhcprelay, dmesg, du, dumpleases, echo, egrep, env, ether-wake, expr, false, fdisk, fgrep, find, free,
fuser, grep, gunzip, gzip, halt, head, hostname, hwclock, id, ifconfig, init, insmod, kill, killall, killall5,
linuxrc, ln, ls, lsmod, mkdir, mknod, mkswap, more, mount, mv, netstat, nice, nmeter, pidof, ping, poweroff,
ps, pwd, rdate, rdev, reboot, renice, rm, rmdir, rmmod, route, sed, sh, sleep, swapoff, swapon, sync, tail,
tar, taskset, tcpsvd, telnetd, top, touch, true, udhcpc, udhcpd, udpsvd, umount, uname, uptime, vi, wc,
xargs, zcat

Let’s see what commands are available inside /bin, /sbin, /usr/bin and /usr/sbin catalogues. Vi editor and top to view active processes list are advantages. By means of vi editor now it is possible to edit text files in the storage.

# ls /bin
[ egrep md5sum
addgroup env mesg stty
adduser expr mkdir submit
arping false mknod swapoff
ash fdisk mkswap swapon
atp fgrep more sync
autoip find mount tail
awk flash_erase mtd_debug tar
basename flash_eraseall mv telnetd
busybox free nanddump test
cat fuser nandtest tinylogin goweb nandwrite top
chgrp grep nice touch
chmod gunzip passwd transmission-daemon
chown gzip pidof transmission-remote
cmp head ping true hostname ps tty
cp pwd umount
crontab hwclock rdate uname
cut id renice usleep
date insmod vi
delgroup kill rm wc
deluser killall rmdir xargs
df ln rmmod xgi
dmesg login xmldb
du ls sed xmldbc
dualimg lsmod sh
dumpleases mathopd
echo matrixtunnel sleep
# ls /sbin
crond getty ifconfig modprobe reboot udhcpc
dumpleases hotplug init poweroff route udhcpd
# ls /usr/bin
ScanMedia raid_delete smartctl
UpdateDB_Daemon gpasswd nfs_service raid_migrate smb
UpdateDB_Daemon_I nmbd raid_recover smb_krb5_cfg_modify
UpdateMediaDB infosvr ntpdate raid_reformat smbclient
afpc inotify_Dir openssl raid_remove_disks smbd
apkg inotify_USB parted raid_remove_mirror smbpasswd
arpscan inotify_iTune phy_ctl raid_restore testusb
blkid inotify_uPNP polling_disks raid_scandisk twonky_conf
btnsetup kinit polling_smart raid_update_info ubutton
cpu_ctl portmap repquota udhcpd_setting
devctl logdb resize2fs upnpc-static
dhcp_handler logtest powermgmt rnl usb_esata_backup
disk_fail lpd product_test rpc.mountd
dumpe2fs mDNSResponderPosix pure-ftpd rpc.nfsd version_check
e2fsck mke2fs quotacheck rsync wbinfo
email ms_PathChk quotaoff rsync_conf web_system
esata_pattern msmtp quotaon samba winbindd
esata_umount mt-daapd raid_add_disks setquota
exportfs mutt raid_append_mirror
ez-ipupdate net raid_config smart_update_db
fwUpdate raid_create smart_update_info
# ls /usr/sbin
db_update lpd_control op_server upscheck usbd usbdisk_out
ddns-start lpq_control test-lan upsd usbdisk_copy zoneinfo
fancontrold mdadm upscan upsdrvctl usbdisk_in

Let’s proceed to the /proc catalogue and see what files are located here. Also let’s find out OS version, time of its operation and average workload and receive information about installed processor.

# pwd
# ls
1 426 57 773 driver misc sys
2 43 58 774 execdomains modules sysvipc
2031 433 63 775 filesystems mounts timer_list
221 454 64 777 fs mtd tty
222 455 648 880 interrupts mv_xor uptime
241 461 65 board_type iomem net version
296 496 66 buddyinfo ioports partitions vmstat
3 498 662 bus irq resource_dump zoneinfo
302 5 689 cmdline kallsyms scsi
313 504 692 cpu kmsg self
329 513 699 cpuinfo loadavg slabinfo
354 537 707 crypto locks soc_type
4 548 758 devices mdstat stat
40 567 770 diskstats meminfo swaps
# cat version
Linux version (This email address is being protected from spambots. You need JavaScript enabled to view it.) (gcc version 4.2.1) #1 Mon Aug 16 12:10:49 CST 2010
# cat uptime
790.78 766.93
# cat loadavg
0.00 0.00 0.00 2/88 2279
# cat cpuinfo
Processor : ARM926EJ-S rev 1 (v5l)
BogoMIPS : 1196.03
Features : swp half thumb fastmult edsp
CPU implementer : 0x56
CPU architecture: 5TE
CPU variant : 0x2
CPU part : 0x131
CPU revision : 1
Cache type : write-back
Cache clean : cp15 c7 ops
Cache lockdown : format C
Cache format : Harvard
I size : 16384
I assoc : 4
I line length : 32
I sets : 128
D size : 16384
D assoc : 4
D line length : 32
D sets : 128
Hardware : Feroceon-KW
Revision : 0000
Serial : 0000000000000000

And finally we’d like to tell you about the control of LEDs located in NAS-M25 front panel. This information is absolutely useless, but could be practicable just for fun. Switching ON/OFF, as well as operation mode of every LED is controlled by cpu_ctl command.

# cpu_ctl
cpu_ctl read #offset(hex)
cpu_ctl write #offset(hex) #value(hex)
cpu_ctl func_state
cpu_ctl fan_state
cpu_ctl fan_high
cpu_ctl fan_low
cpu_ctl fan_stop
cpu_ctl udbg [0|1]
cpu_ctl factor_state
cpu_ctl get_temp
cpu_ctl test_temper
cpu_ctl power_ctrl
cpu_ctl hdd0_led [0 | 1 | 2 | 3| 4] (Off | Green | Red | Blue | Red blink)
cpu_ctl hdd1_led [0 | 1 | 2 | 3| 4]
cpu_ctl usb_led [0 | 1 | 2 ] (Off | On | blink)
cpu_ctl ac_pwr_loss [0 | 1] (Off | On)
cpu_ctl pwr_led_blink [0 | 1] (solid | blink)
cpu_ctl usblp_status

Herewith we complete a brief review of command line interface features.


Usually we start from determination of the device boot time. Under the boot time we understand the time interval between switching on power supply to the moment of first echo-response return via ICMP protocol. ASUS NAS-M25 boots in 49 seconds. In our opinion it is a very good result. Also we measured turnoff time (interval between issuing of turning off command to the storage power off). At the average NAS-M25 is turned off at 18 seconds.

The second test was checking of device security by means of Positive Technologies network security scanner XSpider 7.7 (Demo build 3100). Totally nine open ports were discovered: TCP-21 (FTP), TCP-80 (HTTP), UDP-137 (NetBIOS Name), TCP-139 (NetBIOS Samba), TCP-443 (HTTP SSL), TCP-445 (Microsoft DS), TCP-3306 (MySQL), TCP-8080 (HTTP) and TCP-9998. The most interesting discovered information is as follows.

Examining potential of web-interface we drew our attention to the DHCP Server sub-item in Server menu. This sub-item allows performing dynamic host configuration of wired client in the network local segment. We decided to pay our attention to it and found out that sub-item under discussion has very few settings – range of given addresses and lease time. Default gateway and DNS servers can’t be configured here. Of course we decided to check what DHCP server of NAS-M25 offers. It appeared that computer receives settings of default gateway and DNS servers. But where does the storage take these parameters from?! Standard SOHO routers give IP-address of their LAN interface as default gateway and DNS server. But NAS-M25 can’t perform router’s functions because it doesn’t have second network interface or VLAN support at its physical GE-port. Also web-interface doesn’t have any indications of USB modems support. The decision turned out to be quite simple – the device takes addresses of default gateway and DNS servers from its own network settings (LAN sub-item of Networks menu).

Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Marvell Yukon 88E8001/8003/8010 PCI Gigabit Ethernet Controller
Physical Address. . . . . . . . . : 00-1B-FC-E1-E2-FF
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . :
Subnet Mask . . . . . . . . . . . :
Lease Obtained. . . . . . . . . . : August 20, 2010 2:06:14 AM
Lease Expires . . . . . . . . . . : August 20, 2010 3:06:14 AM
Default Gateway . . . . . . . . . :
DHCP Server . . . . . . . . . . . :
DNS Servers . . . . . . . . . . . :
NetBIOS over Tcpip. . . . . . . . : Enabled

If we examine output of ipconfig /all command we’ll see that DHCP client receives two addresses of default gateway and four addresses of DNS servers. This is twice bigger than indicated in LAN sub-item of Networks menu. Besides specified by the administrator address ASUS NAS-M25 also gives IP address for default gateway which according to the reference is most often used as default gateway address in local networks. It is a very amusing situation; unchangeable default gateway address doesn’t belong to the sub-network in which the storage interface is located because doesn’t belong to the sub-network So it never can be available for the local computers. The output of this parameter to the clients has no sense except the case when the user manually sets addresses to the storage from the range.

We deleted record on default about the default gateway from network settings and requested IP parameters once again. In this case the user receives only IP-address as a default gateway.

Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Marvell Yukon 88E8001/8003/8010 PCI Gigabit Ethernet Controller
Physical Address. . . . . . . . . : 00-1B-FC-E1-E2-FF
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . :
Subnet Mask . . . . . . . . . . . :
Lease Obtained. . . . . . . . . . : August 20, 2010 2:06:14 AM
Lease Expires . . . . . . . . . . : August 20, 2010 3:06:14 AM
Default Gateway . . . . . . . . . :
DHCP Server . . . . . . . . . . . :
DNS Servers . . . . . . . . . . . :
NetBIOS over Tcpip. . . . . . . . : Enabled

Also there is no clarity with the IP addresses which NAS-M25 offers to the DHCP-clients as DNS-servers ( and We addressed to the APNIC server Whois in order to determine belonging of these addresses. By the moment of this article creation both IP addresses under discussion were located in the Chunghwa Telecom Co., Ltd addressing space. Evidently ASUS trusts to this telecommunication company very much if it uses their external DNS servers.

Perhaps the most interesting part of this section is performance tests of network storage. We measured access rate to the folders via NetBIOS protocol by means of utility Intel NASPT 1.7.1 for all types of available RAIDs (Individual Disk, JBOD, RAID0 и RAID1) and both file-systems (ext2 and ext3). Besides we also measured access rate to the external USB-drive, data coping speed from USB devices to the hard disc, file transfer by means of AjaXplorer and via FTP protocol and operation speed of Download Master. Measurement results are indicated in the following diagrams.

We were surprised by data load performance via HTTP and FTP protocols by means of Download Master. We can’t make ourselves clear the purpose of these restrictions. Access rates via other protocols have lots megabytes per second.

Also we decided to check change of access rate at increasing of maximum packet size (turning on Jumbo-frames support). We made necessary changes in the storage and testing PC settings. Then we made sure that Jumbo-frames were being used, but there was no evident influence on data transfer rate.

As usual in the end of this section we make connection to multimedia service of server with UPnP support. In the ASUS NAS-M25 settings this service was switched on, and a folder with user’s multimedia files were selected.

We were surprised a little bit later when we tried to connect to the storage by means of Windows Media Center and Windows Media player. Both applications found available via UPnP multimedia device but failed to connect to it.

Of course we informed manufacturer about revealed problems and version of firmware is free from this error. ASUS NAS-M25 is detected as TwonkyServer [NAS-M25].

The testing is over let’s summarize it.


Generally we like this device more than dislike it. We think that ASUS attempt to approach the network storage market in SOHO segment was a success. But of course sale results and users will dot all the i's and cross all the t's. Still we can’t but indicate disadvantages.

  • Poor case design (front cover comes loose, hard disks are difficult to take out, small fan)…
  • Unpretentious functional of firmware, no software for PC.
  • Very low loading speeds by means of Download Master.
  • Errors in Russian web-interface.

Advantages of ASUS NAS-M25.

  • Proper for SOHO devices access rate to the stored information.
  • Possibility to diagnose installed hard disks.
  • Possibility to control access rate to the storage via FTP at 10 Kbyte/s step.
  • Robustness to network attacks.
  • Multilingual web-interface.

Unfortunately by the moment of article creation ASUS NAS-M25 hasn’t been sold neither in Russia nor in the world, though it can be found in the Road Map, so it is very early to speak about the price.

The author and editorial staff thank ASUS Moscow representative office for provided equipment for testing.