| RTW(4) | Device Drivers Manual | RTW(4) | 
rtw —
rtw* at cardbus? function ?
rtw* at pci? dev ? function ?
rtw driver supports PCI/CardBus 802.11b wireless
  adapters based on the Realtek RTL8180L.
A variety of radio transceivers can be found in these devices, including the Philips SA2400A, Maxim MAX2820, and GCT GRF5101, though not all of them are currently supported.
These are the modes the rtw driver can
    operate in:
rtw supports software WEP. Wired
    Equivalent Privacy (WEP) is the de facto encryption standard for wireless
    networks. It can be typically configured in one of three modes: no
    encryption; 40-bit encryption; or 104-bit encryption. Unfortunately, due to
    serious weaknesses in WEP protocol it is strongly recommended that it not be
    used as the sole mechanism to secure wireless communication. WEP is not
    enabled by default.
rtw driver can be configured at runtime with
  ifconfig(8) or on boot with
  ifconfig.if(5) using the
  following parameters:
bssid
    bssid-bssidchan
    n-chanmedia
    mediartw driver supports the following
      media types:
    
    autoselectDS1DS2DS5DS11mediaopt
    optsrtw driver supports the following media
      options:
    
    
  -mediaopt
    optsssid
    idrtw driver uses an empty string. Note that network
      ID is synonymous with Extended Service Set ID (ESSID).nwkey
    keyrtw is capable of using both 40-bit (5 characters
      or 10 hexadecimal digits) or 104-bit (13 characters or 26 hexadecimal
      digits) keys.-nwkeynwkey
    persist| Card | Bus | 
| Belkin
      F5D6020 V3 | CardBus | 
| Buffalo
      WLI-CB-B11 | CardBus | 
| Corega
      CG-WLCB11V3 | CardBus | 
| D-Link
      DWL-610 | CardBus | 
| Level-One
      WPC-0101 | CardBus | 
| Linksys
      WPC11 v4 | CardBus | 
| Netgear
      MA521 | CardBus | 
| Ovislink
      AirLive WL-1120PCM | CardBus | 
| Planet
      WL-3553 | CardBus | 
| TrendNET
      TEW-266PC | CardBus | 
| VCTnet
      PC-11B1 | CardBus | 
inet 192.168.1.1 255.255.255.0 NONE media autoselect \ mediaopt hostap ssid my_net chan 11
Configure rtw0 for WEP, using hex key “0x1deadbeef1”:
# ifconfig rtw0 nwkey 0x1deadbeef1
Return rtw0 to its default settings:
# ifconfig rtw0 -bssid -chan media autoselect \ ssid "" -nwkey
Join an existing BSS network, “my_net”:
# ifconfig rtw0 192.168.1.1 netmask 0xffffff00 ssid my_net
Realtek, http://www.realtek.com.tw.
rtw device driver first appeared in
  NetBSD 3.0 and then in OpenBSD
  3.7.
rtw driver was written by David
  Young ⟨dyoung@NetBSD.org⟩ and ported to
  OpenBSD by Jonathan Gray
  <jsg@openbsd.org>, who
  wrote this man page.
While PCI devices will attach most of them are not able to transmit.
| December 29, 2004 | NetBSD 10.1 |