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| author |   Patrick J Volkerding <volkerdi@slackware.com> | 2009-08-26 10:00:38 -0500 |
|---|---|---|
| committer |   Eric Hameleers <alien@slackware.com> | 2018-05-31 22:41:17 +0200 |
| commit | 5a12e7c134274dba706667107d10d231517d3e05 (patch) | |
| tree | 55718d5acb710fde798d9f38d0bbaf594ed4b296 /slackbook/html/network-configuration-wireless.html | |
| download | current-5a12e7c134274dba706667107d10d231517d3e05.tar.gz current-5a12e7c134274dba706667107d10d231517d3e05.tar.xz | |
Slackware 13.0slackware-13.0
Wed Aug 26 10:00:38 CDT 2009
Slackware 13.0 x86_64 is released as stable! Thanks to everyone who
helped make this release possible -- see the RELEASE_NOTES for the
credits. The ISOs are off to the replicator. This time it will be a
6 CD-ROM 32-bit set and a dual-sided 32-bit/64-bit x86/x86_64 DVD.
We're taking pre-orders now at store.slackware.com. Please consider
picking up a copy to help support the project. Once again, thanks to
the entire Slackware community for all the help testing and fixing
things and offering suggestions during this development cycle.
As always, have fun and enjoy! -P.
Diffstat (limited to 'slackbook/html/network-configuration-wireless.html')
| -rw-r--r-- | slackbook/html/network-configuration-wireless.html | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/slackbook/html/network-configuration-wireless.html b/slackbook/html/network-configuration-wireless.html new file mode 100644 index 000000000..fa86dcc26 --- /dev/null +++ b/slackbook/html/network-configuration-wireless.html @@ -0,0 +1,208 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" + "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> +<html xmlns="http://www.w3.org/1999/xhtml"> +<head> +<meta name="generator" content="HTML Tidy, see www.w3.org" /> +<title>Wireless</title> +<meta name="GENERATOR" content="Modular DocBook HTML Stylesheet Version 1.7" /> +<link rel="HOME" title="Slackware Linux Essentials" href="index.html" /> +<link rel="UP" title="Network Configuration" href="network-configuration.html" /> +<link rel="PREVIOUS" title="PPP" href="network-configuration-ppp.html" /> +<link rel="NEXT" title="Network File Systems" href="network-configuration-nfs.html" /> +<link rel="STYLESHEET" type="text/css" href="docbook.css" /> +<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> +</head> +<body class="SECT1" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#840084" +alink="#0000FF"> +<div class="NAVHEADER"> +<table summary="Header navigation table" width="100%" border="0" cellpadding="0" +cellspacing="0"> +<tr> +<th colspan="3" align="center">Slackware Linux Essentials</th> +</tr> + +<tr> +<td width="10%" align="left" valign="bottom"><a href="network-configuration-ppp.html" +accesskey="P">Prev</a></td> +<td width="80%" align="center" valign="bottom">Chapter 5 Network Configuration</td> +<td width="10%" align="right" valign="bottom"><a href="network-configuration-nfs.html" +accesskey="N">Next</a></td> +</tr> +</table> + +<hr align="LEFT" width="100%" /> +</div> + +<div class="SECT1"> +<h1 class="SECT1"><a id="NETWORK-CONFIGURATION-WIRELESS" +name="NETWORK-CONFIGURATION-WIRELESS">5.5 Wireless</a></h1> + +<p>Wireless networking is still a relatively new thing in the world of computers, yet is +quickly catching on as more people begin to purchase laptops and want networking on the +go, without having to fool with some old twisted pair cable. This trend doesn't appear to +be slowing down. Unfortunately, wireless networking isn't yet as strongly supported in +Linux as traditional wired networking.</p> + +<p>There are three basic steps to configuring an 802.11 wireless Ethernet card:</p> + +<ol type="1"> +<li> +<p>Hardware support for the wireless card</p> +</li> + +<li> +<p>Configure the card to connect to a wireless access point</p> +</li> + +<li> +<p>Configure the network</p> +</li> +</ol> + +<div class="SECT2"> +<h2 class="SECT2"><a id="AEN2033" name="AEN2033">5.5.1 Hardware Support</a></h2> + +<p>Hardware support for a wireless card is provided through the kernel, either with a +module or built in to the kernel. Generally, most newer Ethernet cards are provided +through kernel modules, so you'll want to determine the appropriate kernel module and +load it through <tt class="FILENAME">/etc/rc.d/rc.modules</tt>. <tt +class="COMMAND">netconfig</tt> may not detect your wireless card, so you'll probably need +to determine the card yourself. See <a +href="http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/" +target="_top">http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/</a> for more +information on kernel drivers for various wireless cards.</p> +</div> + +<div class="SECT2"> +<h2 class="SECT2"><a id="AEN2044" name="AEN2044">5.5.2 Configure the Wireless +Settings</a></h2> + +<p>The vast majority of this work is done by <tt class="COMMAND">iwconfig</tt>, so as +always read the man page for <tt class="COMMAND">iwconfig</tt> if you need more +information.</p> + +<p>First, you'll want to configure your wireless access point. Wireless access points +vary quite a bit in their terminology, and how to configure them, so you may need to +adjust a bit to accommodate your hardware. In general, you'll need at least the following +information:</p> + +<ul> +<li> +<p>The domain ID, or name of the network (called the ESSID by <tt +class="COMMAND">iwconfig</tt>)</p> +</li> + +<li> +<p>The channel the WAP uses</p> +</li> + +<li> +<p>The encryption settings, including any keys used (preferably in hexadecimal)</p> +</li> +</ul> + +<div class="WARNING"> +<table class="WARNING" width="100%" border="0"> +<tr> +<td width="25" align="CENTER" valign="TOP"><img src="./imagelib/admon/warning.png" +hspace="5" alt="Warning" /></td> +<td align="LEFT" valign="TOP"> +<p>A NOTE ABOUT WEP. WEP is quit flawed, but it's much better than nothing. If you wish a +greater degree of security on your wireless network, you should investigate VPNs or +IPSec, both of which are beyond the scope of this document. You might also configure your +WAP not to advertise its domain ID/ ESSID. A thorough discussion of wireless policy is +beyond the scope of this section, but a quick Google search will turn up more than you +ever wanted to know.</p> +</td> +</tr> +</table> +</div> + +<p>Once you've gathered the above information, and assuming you've used <tt +class="COMMAND">modprobe</tt> to load the appropriate kernel driver, you can edit <tt +class="FILENAME">rc.wireless.conf</tt> and add your settings. The <tt +class="FILENAME">rc.wireless.conf</tt> file is a bit untidy. The least effort is to +modify the generic section with your ESSID and KEY, and CHANNEL if required by your card. +(Try not setting CHANNEL, and if it works, great; if not, set the CHANNEL as +appropriate.) If you're daring, you can modify the file so that only the necessary +variables are set. The variable names in <tt class="FILENAME">rc.wireless.conf</tt> +correspond to the <tt class="COMMAND">iwconfig</tt> parameters, and are read by <tt +class="FILENAME">rc.wireless</tt> and used in the appropriate <tt +class="COMMAND">iwconfig</tt> commands.</p> + +<p>If you have your key in hexadecimal, that's ideal, since you can be fairly confident +that your WAP and <tt class="COMMAND">iwconfig</tt> will agree on the key. If you only +have a string, you can't be sure how your WAP will translate that into a hexadecimal key, +so some guesswork may be needed (or get your WAP's key in hex).</p> + +<p>Once you've modified <tt class="FILENAME">rc.wireless.conf</tt>, run <tt +class="FILENAME">rc.wireless</tt> as <tt class="USERNAME">root</tt>, then run <tt +class="FILENAME">rc.inet1</tt>, again as <tt class="USERNAME">root</tt>. You can test +your wireless networking with standard testing tools such as <tt +class="COMMAND">ping</tt>, along with <tt class="COMMAND">iwconfig</tt>. If you have a +wired interface you may wish to use <tt class="COMMAND">ifconfig</tt> to turn those +interfaces off while you test your wireless networking to ensure there's no interference. +You may also want to test your changes through a reboot.</p> + +<p>Now that you've seen how to edit <tt class="FILENAME">/etc/rc.d/rc.wireless</tt> for +you default network, let's take a closer look at iwconfig and see how it all works. This +will teach you the quick and dirty way of setting up wifi for those times when you find +yourself at an Internet cafe, coffee shop, or any other wifi hot spot and wish to get +online.</p> + +<p>The first step is to tell your wireless NIC what network to join. Make sure you +replace “<tt class="FILENAME">eth0</tt>” with whatever network interface your +wireless card uses and change “<var class="REPLACEABLE">mynetwork</var>” to +the essid you wish to use. Yes, we know you're smarter than that. Next you'll have to +specify the encryption key (if any) used on your wireless network. Finally specify the +channel to use (if needed).</p> + +<table border="0" bgcolor="#E0E0E0" width="100%"> +<tr> +<td> +<pre class="SCREEN"> +<samp class="PROMPT">#</samp> <kbd class="USERINPUT">iwconfig eth0 essid "<var +class="REPLACEABLE">mynetwork</var>"</kbd> +<samp class="PROMPT">#</samp> <kbd class="USERINPUT">iwconfig eth0 key <var +class="REPLACEABLE">XXXXXXXXXXXXXXXXXXXXXXXXXXX</var></kbd> +<samp class="PROMPT">#</samp> <kbd class="USERINPUT">iwconfig eth0 channel n</kbd> +</pre> +</td> +</tr> +</table> + +<p>That should be all on the wireless end of things.</p> +</div> + +<div class="SECT2"> +<h2 class="SECT2"><a id="AEN2101" name="AEN2101">5.5.3 Configure the Network</a></h2> + +<p>This is done in the exact same way as wired networks. Simply refer to earlier sections +of this chapter.</p> +</div> +</div> + +<div class="NAVFOOTER"> +<hr align="LEFT" width="100%" /> +<table summary="Footer navigation table" width="100%" border="0" cellpadding="0" +cellspacing="0"> +<tr> +<td width="33%" align="left" valign="top"><a href="network-configuration-ppp.html" +accesskey="P">Prev</a></td> +<td width="34%" align="center" valign="top"><a href="index.html" +accesskey="H">Home</a></td> +<td width="33%" align="right" valign="top"><a href="network-configuration-nfs.html" +accesskey="N">Next</a></td> +</tr> + +<tr> +<td width="33%" align="left" valign="top">PPP</td> +<td width="34%" align="center" valign="top"><a href="network-configuration.html" +accesskey="U">Up</a></td> +<td width="33%" align="right" valign="top">Network File Systems</td> +</tr> +</table> +</div> +</body> +</html> + |