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

NAME
     urtw -- Realtek RTL8187L/RTL8187B USB IEEE	802.11b/g wireless network de-
     vice

SYNOPSIS
     urtw* at uhub? port ?

DESCRIPTION
     The urtw driver supports USB 802.11b/g wireless adapters based on the Re-
     altek RTL8187L and	RTL8187B.

     These are the modes the urtw driver can operate in:

     BSS mode	    Also known as infrastructure mode, this is used when asso-
		    ciating with an access point, through which	all traffic
		    passes.  This mode is the default.

     monitor mode   In this mode the driver is able to receive packets without
		    associating	with an	access point.  This disables the in-
		    ternal receive filter and enables the card to capture
		    packets from networks which	it wouldn't normally have ac-
		    cess to, or	to scan	for access points.

     The urtw driver can be configured to use Wired Equivalent Privacy (WEP)
     or	Wi-Fi Protected	Access (WPA1 and WPA2).	 WPA2 is the current encryp-
     tion standard for wireless	networks.  It is strongly recommended that
     neither WEP nor WPA1 are used as the sole mechanism to secure wireless
     communication, due	to serious weaknesses.	WPA1 is	disabled by default
     and may be	enabled	using the option "wpaprotos wpa1,wpa2".	 For standard
     WPA networks which	use pre-shared keys (PSK), keys	are configured using
     the "wpakey" option.  WPA-Enterprise networks require use of the wpa_sup-
     plicant package.  The urtw	driver relies on the software 802.11 stack for
     both encryption and decryption of data frames.

     The urtw driver can be configured at runtime with ifconfig(8) or on boot
     with hostname.if(5).

HARDWARE
     The following adapters should work:

	   Alfa	AWUS036H
	   ASUS	P5B Deluxe
	   Belkin F5D7050E
	   Digitus DN-7003GT
	   Linksys WUSB54GC v2
	   Netgear WG111v2
	   Netgear WG111v3
	   Shuttle XPC Accessory PN20
	   Sitecom WL-168 v1
	   Sitecom WL-168 v4
	   Surecom EP-9001-g rev 2A
	   TRENDnet TEW-424UB V3.xR

EXAMPLES
     The following example scans for available networks:

	   # ifconfig urtw0 scan

     The following hostname.if(5) example configures urtw0 to join network
     "mynwid", using WPA key "mywpakey", obtaining an IP address using DHCP:

	   nwid	mynwid wpakey mywpakey
	   dhcp

SEE ALSO
     arp(4), ifmedia(4), intro(4), netintro(4),	usb(4),	hostname.if(5),
     ifconfig(8)

     Realtek Semiconductor: http://www.realtek.com.tw/

HISTORY
     The urtw device driver first appeared in OpenBSD 4.5.

AUTHORS
     The urtw driver was written by Weongyo Jeong <weongyo@FreeBSD.org>.

CAVEATS
     This driver does not support powersave mode.

FreeBSD	13.0		       November	10, 2019		  FreeBSD 13.0

NAME | SYNOPSIS | DESCRIPTION | HARDWARE | EXAMPLES | SEE ALSO | HISTORY | AUTHORS | CAVEATS

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<https://www.freebsd.org/cgi/man.cgi?query=urtw&sektion=4&manpath=OpenBSD+6.9>

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