1.\" $OpenBSD: urtw.4,v 1.21 2014/02/15 20:28:19 tedu Exp $ 2.\" 3.\" Copyright (c) 2008 Weongyo Jeong <weongyo@FreeBSD.org> 4.\" 5.\" Permission to use, copy, modify, and distribute this software for any 6.\" purpose with or without fee is hereby granted, provided that the above 7.\" copyright notice and this permission notice appear in all copies. 8.\" 9.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16.\" 17.Dd $Mdocdate: February 15 2014 $ 18.Dt URTW 4 19.Os 20.Sh NAME 21.Nm urtw 22.Nd Realtek RTL8187L/RTL8187B USB IEEE 802.11b/g wireless network device 23.Sh SYNOPSIS 24.Cd "urtw* at uhub? port ?" 25.Sh DESCRIPTION 26The 27.Nm 28driver supports USB 802.11b/g wireless adapters based on the 29Realtek RTL8187L and RTL8187B. 30.Pp 31These are the modes the 32.Nm 33driver can operate in: 34.Bl -tag -width "IBSS-masterXX" 35.It BSS mode 36Also known as 37.Em infrastructure 38mode, this is used when associating with an access point, through 39which all traffic passes. 40This mode is the default. 41.It monitor mode 42In this mode the driver is able to receive packets without 43associating with an access point. 44This disables the internal receive filter and enables the card to 45capture packets from networks which it wouldn't normally have access to, 46or to scan for access points. 47.El 48.Pp 49The 50.Nm 51driver can be configured to use 52Wired Equivalent Privacy (WEP) or 53Wi-Fi Protected Access (WPA-PSK and WPA2-PSK). 54WPA is the current encryption standard for wireless networks. 55It is strongly recommended that WEP 56not be used as the sole mechanism 57to secure wireless communication, 58due to serious weaknesses in it. 59The 60.Nm 61driver relies on the software 802.11 stack for both encryption and decryption 62of data frames. 63.Pp 64The 65.Nm 66driver can be configured at runtime with 67.Xr ifconfig 8 68or on boot with 69.Xr hostname.if 5 . 70.Sh HARDWARE 71The following adapters should work: 72.Pp 73.Bl -tag -width Ds -offset indent -compact 74.It Alfa AWUS036H 75.It ASUS P5B Deluxe 76.It Belkin F5D7050E 77.It Linksys WUSB54GC v2 78.It Netgear WG111v2 79.It Netgear WG111v3 80.It Shuttle XPC Accessory PN20 81.It Sitecom WL-168 v1 82.It Sitecom WL-168 v4 83.It Surecom EP-9001-g rev 2A 84.It TRENDnet TEW-424UB V3.xR 85.El 86.Sh EXAMPLES 87The following example scans for available networks: 88.Pp 89.Dl # ifconfig urtw0 scan 90.Pp 91The following 92.Xr hostname.if 5 93example configures urtw0 to join network 94.Dq mynwid , 95using WPA key 96.Dq mywpakey , 97obtaining an IP address using DHCP: 98.Bd -literal -offset indent 99nwid mynwid 100wpakey mywpakey 101dhcp 102.Ed 103.Sh SEE ALSO 104.Xr arp 4 , 105.Xr ifmedia 4 , 106.Xr intro 4 , 107.Xr netintro 4 , 108.Xr usb 4 , 109.Xr hostname.if 5 , 110.Xr hostapd 8 , 111.Xr ifconfig 8 112.Pp 113Realtek Semiconductor: 114.Lk http://www.realtek.com.tw/ 115.Sh HISTORY 116The 117.Nm 118device driver first appeared in 119.Ox 4.5 . 120.Sh AUTHORS 121The 122.Nm 123driver was written by 124.An Weongyo Jeong Aq Mt weongyo@FreeBSD.org . 125