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URTW(4)                  BSD Kernel Interfaces Manual                  URTW(4)

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

     urtw* at uhub? port ?

     The urtw driver supports USB 802.11b/g wireless adapters based on the
     Realtek 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
                    internal receive filter and enables the card to capture
                    packets from networks which it wouldn't normally have
                    access to, or to scan for access points.

     The urtw driver can be configured to use Wired Equivalent Privacy (WEP)
     or Wi-Fi Protected Access (WPA-PSK and WPA2-PSK).  WPA is the current
     encryption standard for wireless networks.  It is strongly recommended
     that WEP not be used as the sole mechanism to secure wireless communica-
     tion, due to serious weaknesses in it.  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).

     The following adapters should work:

           Alfa AWUS036H
           ASUS P5B Deluxe
           Belkin F5D7050E
           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

     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

           nwid mynwid
           wpakey mywpakey

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

     Realtek Semiconductor:

     The urtw device driver first appeared in OpenBSD 4.5.

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

BSD                            February 15, 2014                           BSD