Linksys WRT120N

Linksys WRT120N v1

Manuf (OEM/ODM): Arcadyan

FCC approval date: 29 April 2009
UPC: 745883587858 (UPC DB, On eBay)
Country of manuf.: China
S/N prefix: JUT0, JUT00

Amazon image

ASIN
B0028N6VNW (, On Amazon, On CCC)

Type: wireless router

FCC ID: Q87-WRT120N
IC ID: 3839A-WRT120N

Power: 12 VDC, 1 A
Connector type: barrel

CPU1: Atheros AR7240 (400 MHz)
FLA1: 2 MiB 2,097,152 B <br />16,384 Kib <br />2,048 KiB <br />16 Mib <br />0.00195 GiB <br /> (Macronix MX25L1606E)
RAM1: 32 MiB 33,554,432 B <br />262,144 Kib <br />32,768 KiB <br />256 Mib <br />0.0313 GiB <br /> (Winbond W9425G6JH-5)

Expansion IFs: none specified

WI1 chip1: Atheros AR9285
WI1 802dot11 protocols: bgn
WI1 MIMO config: 1x1:1
WI1 antenna connector: none

ETH chip1: Atheros AR7240
Switch: Atheros AR7240
LAN speed: 100M
LAN ports: 4
WAN speed: 100M
WAN ports: 1

bgn

Stock FW OS: SuperTask!

Default SSID: linksys (50 addl. devices)
Default IP address: 192.168.1.1
the IP 192.168.1.1 is used by 1297 additional devices
of which 153 are Linksys devices
Default login user: blank
Default login password: admin
blank:admin credentials used by 289 additional devices
of which 142 are Linksys devices

802dot11 OUI: 00:25:9C (8 E, 15 W), 68:7F:74 (13 E, 16 W), 98:FC:11 (8 E, 9 W)
Ethernet OUI: 00:25:9C (8 E, 15 W), 68:7F:74 (13 E, 16 W), 98:FC:11 (8 E, 9 W)

For a list of all currently documented Atheros (QCA) chipsets with specifications, see Atheros.

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Wireless-N Home Router

 • Support page  • (Template link outdated)

"P/N: 141700520014J R0A2" is silkscreened on the board in the FCC photos.

The serial number for this device may be prefixed with JUT0 / JUT00.

• Linksys WRT120N on TechInfoDepot
• Linksys WRT120N Reviewed by SmallNetBuilder
• Linksys WRT120N supported ? on the DD-WRT forums

(but lists processor and wireless chip part numbers)

• Listed on the 'Linksys routers' page on Wikipedia

Additional external links

Reverse engineering

Craig's posts on /dev/ttyS0

• Reversing the WRT120N’s Firmware Obfuscation (2014-02-02)
• Re-enabling JTAG and Debugging the WRT120N (2014-02-05)
  • notes the OS used as SuperTask!
• Cracking Linksys “Encryption” (2014-02-12)
• WRT120N fprintf Stack Overflow (2014-02-19)