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Man Pages
URTW(4) FreeBSD Kernel Interfaces Manual URTW(4)

urtw
Realtek RTL8187B/L USB IEEE 802.11b/g wireless network device

To compile this driver into the kernel, place the following lines in your kernel configuration file:
device ehci
device uhci
device ohci
device usb
device urtw
device wlan
Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):
if_urtw_load="YES"

The urtw driver supports USB 802.11b/g wireless adapters based on the Realtek RTL8187B/L.
urtw supports station and monitor mode operation. Only one virtual interface may be configured at any time. For more information on configuring this device, see ifconfig(8).

The urtw driver supports Realtek RTL8187B/L based wireless network devices, including:
Card Radio Bus
Belkin F5D7050E RTL8225 USB
Linksys WUSB54GCv2 RTL8225 USB
Netgear WG111v2 RTL8225 USB
Netgear WG111v3 RTL8225 USB
Safehome WLG-1500SMA5 RTL8225 USB
Shuttle XPC Accessory PN20 RTL8225 USB
Sitecom WL168v1 RTL8225 USB
Sitecom WL168v4 RTL8225 USB
SureCom EP-9001-g(2A) RTL8225 USB
TRENDnet TEW-424UB V3.xR RTL8225 USB

Join an existing BSS network (i.e., connect to an access point):
ifconfig wlan create wlandev urtw0 inet 192.168.0.20 \ 
    netmask 0xffffff00
Join a specific BSS network with network name “my_net”:
ifconfig wlan create wlandev urtw0 ssid my_net up
Join a specific BSS network with 64-bit WEP encryption:
ifconfig wlan create wlandev urtw0 ssid my_net \ 
	wepmode on wepkey 0x1234567890 weptxkey 1 up

intro(4), netintro(4), usb(4), wlan(4), wlan_ccmp(4), wlan_tkip(4), wlan_wep(4), ifconfig(8), wpa_supplicant(8)
Realtek, http://www.realtek.com.tw.

The urtw device driver first appeared in FreeBSD 8.0.

The urtw driver was written by Weongyo Jeong <weongyo@FreeBSD.org>.
October 17, 2009 FreeBSD 12.0-RELEASE

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