> For the complete documentation index, see [llms.txt](https://book.bsdcn.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://book.bsdcn.org/man/man4/urtw.4.md).

# urtw\.4

`urtw` — Realtek RTL8187B/L USB IEEE 802.11b/g 无线网络驱动

## 名称

`urtw`

## 概要

要将此驱动编译进内核，请将以下行加入你的内核配置文件：

> device ehci device uhci device ohci device usb device urtw device wlan

或者，要在引导时以模块方式加载该驱动，请将以下行加入 loader.conf(5)：

```sh
if_urtw_load="YES"
```

## 描述

`urtw` 驱动支持基于 Realtek RTL8187B/L 的 USB 802.11b/g 无线适配器。

`urtw` 支持 `station` 和 `monitor` 模式操作。任一时刻只能配置一个虚拟接口。

有关配置此设备的更多信息，请参见 [ifconfig(8)](/man/man8/ifconfig.8.md)。

## 硬件

`urtw` 驱动支持基于 Realtek RTL8187B/L 的无线网络设备，包括：

| *Card*                     | *Radio* | *Bus* |
| -------------------------- | ------- | ----- |
| Belkin F5D7050E            | RTL8225 | USB   |
| Linksys WUSB54GCv2         | RTL8225 | USB   |
| Netgear WG111v2            | RTL8225 | USB   |
| Netgear WG111v3            | RTL8225 | USB   |
| Safehome WLG-1500SMA5      | RTL8225 | USB   |
| Shuttle XPC Accessory PN20 | RTL8225 | USB   |
| Sitecom WL168v1            | RTL8225 | USB   |
| Sitecom WL168v4            | RTL8225 | USB   |
| SureCom EP-9001-g(2A)      | RTL8225 | USB   |
| TRENDnet TEW-424UB V3.xR   | RTL8225 | USB   |

## 实例

加入现有的 BSS 网络（即连接到接入点）：

```sh
ifconfig wlan create wlandev urtw0 inet 192.0.2.20/24
```

加入网络名为 `my_net` 的特定 BSS 网络：

```sh
ifconfig wlan create wlandev urtw0 ssid my_net up
```

加入使用 64 位 WEP 加密的特定 BSS 网络：

```sh
ifconfig wlan create wlandev urtw0 ssid my_net e
    wepmode on wepkey 0x1234567890 weptxkey 1 up
```

## 参见

[intro(4)](/man/man4/intro.4.md), [netintro(4)](/man/man4/netintro.4.md), [usb(4)](/man/man4/usb.4.md), [wlan(4)](/man/man4/wlan.4.md), [wlan\_ccmp(4)](/man/man4/wlan_ccmp.4.md), [wlan\_tkip(4)](/man/man4/wlan_tkip.4.md), [wlan\_wep(4)](/man/man4/wlan_wep.4.md), [ifconfig(8)](/man/man8/ifconfig.8.md), wpa\_supplicant(8)

> "Realtek".

## 历史

`urtw` 设备驱动首次出现于 FreeBSD 8.0。

## 作者

`urtw` 驱动由 Weongyo Jeong <weongyo@FreeBSD.org> 编写。


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://book.bsdcn.org/man/man4/urtw.4.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.