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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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