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PAL.C.T MINI SHELL
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<p class="apache">Apache HTTP Server Version 2.4</p>
<img alt="" src="./images/feather.gif" /></div>
<div class="up"><a href="./"><img title="&lt;-" alt="&lt;-" src="./images/left.gif" /></a></div>
<div id="path">
<a href="http://www.apache.org/">Apache</a> &gt; <a href="http://httpd.apache.org/">HTTP Server</a> &gt; <a href="http://httpd.apache.org/docs/">Documentation</a> &gt; <a href="./">Version 2.4</a></div><div id="page-content"><div id="preamble"><h1>DNS ġ õ </h1>
<div class="toplang">
<p><span> : </span><a href="./en/dns-caveats.html" hreflang="en" rel="alternate" title="English">&nbsp;en&nbsp;</a> |
<a href="./fr/dns-caveats.html" hreflang="fr" rel="alternate" title="Fran&#231;ais">&nbsp;fr&nbsp;</a> |
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</div>
<div class="outofdate">  ֽ  ƴմϴ.
            ֱٿ     ϼ.</div>

    <p>      ִ. ġ 
     DNS ʵ ϶. ġ  дµ
    DNS ʿϴٸ  ŷڼ  ( ȵ  ִ)
    Ȥ 񽺰ź ݰ (ڰ ٸ ڿ  
    ä  Ͽ) 񽺵(theft of service) ݿ
    ô޸  ִ.</p>
  </div>
<div id="quickview"><ul id="toc"><li><img alt="" src="./images/down.gif" /> <a href="#example"> </a></li>
<li><img alt="" src="./images/down.gif" /> <a href="#denial">񽺰ź (Denial of Service)</a></li>
<li><img alt="" src="./images/down.gif" /> <a href="#main">"ּ" ּ</a></li>
<li><img alt="" src="./images/down.gif" /> <a href="#tips">  ϱ </a></li>
<li><img alt="" src="./images/down.gif" /> <a href="#appendix">η: δ</a></li>
</ul><ul class="seealso"><li><a href="#comments_section">Comments</a></li></ul></div>
<div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div>
<div class="section">
<h2><a name="example" id="example"> </a></h2>
    

    <div class="example"><p><code>
      &lt;VirtualHost www.abc.dom&gt; <br />
      ServerAdmin webgirl@abc.dom <br />
      DocumentRoot /www/abc <br />
      &lt;/VirtualHost&gt;
    </code></p></div>

    <p>ġ  ϱؼ  ȣƮ
     ΰ   ʿϴ.  
    <code class="directive"><a href="./mod/core.html#servername">ServerName</a></code> 
    ٸ  ּ Ѱ IP ̴ּ.   IP ּҰ
    ⶧, ġ DNS Ͽ <code>www.abc.dom</code>
    ּҸ ãƾ Ѵ.     
    DNS   ٸ ȣƮ <strong>  </strong>.
     ȣƮ û   . (ġ 1.2 
       õ Ѵ.)</p>

    <p><code>www.abc.dom</code> ּҰ 192.0.2.1̶ .
    ׸   :</p>

    <div class="example"><p><code>
      &lt;VirtualHost 192.0.2.1&gt; <br />
      ServerAdmin webgirl@abc.dom <br />
      DocumentRoot /www/abc <br />
      &lt;/VirtualHost&gt;
    </code></p></div>

    <p> ġ  ȣƮ <code>ServerName</code>
    ã DNS ؾ Ѵ. ãⰡ ϸ ġ
    ȣƮ κ . (ġ 1.2  
      õ Ѵ.) ,   ̸
    ȣƮ ȣƮ  ʰ, ip̶
    κ Ѵ. ׷ ġ  Ͽ 
    ü URL  Ѵٸ  URL  Ѵ.</p>

    <p>Ʒ   ΰ  .</p>

    <div class="example"><p><code>
      &lt;VirtualHost 192.0.2.1&gt; <br />
      ServerName www.abc.dom <br />
      ServerAdmin webgirl@abc.dom <br />
      DocumentRoot /www/abc <br />
      &lt;/VirtualHost&gt;
    </code></p></div>
  </div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div>
<div class="section">
<h2><a name="denial" id="denial">񽺰ź (Denial of Service)</a></h2>
    

    <p>(ּ) ΰ  񽺰źΰ ߻  ִ.
    ġ 1.2     ȣƮ
       DNS ˻ ϸ   ʴ´.
    DNS      ִ.  ,
    <code>abc.dom</code>  Ʈ̰  ڽ DNS
    Ѵٸ, <code>www.abc.dom</code> ڵ带 ⸸ ص
    (1.2 )   Ѵ.</p>

    <p>ξ  Ȱ  ִ.   캸:</p>

    <div class="example"><p><code>
      &lt;VirtualHost www.abc.dom&gt; <br />
      &nbsp;&nbsp;ServerAdmin webgirl@abc.dom <br />
      &nbsp;&nbsp;DocumentRoot /www/abc <br />
      &lt;/VirtualHost&gt; <br />
      <br />
      &lt;VirtualHost www.def.dom&gt; <br />
      &nbsp;&nbsp;ServerAdmin webguy@def.dom <br />
      &nbsp;&nbsp;DocumentRoot /www/def <br />
      &lt;/VirtualHost&gt;
    </code></p></div>

    <p> <code>www.abc.dom</code> 192.0.2.1,
    <code>www.def.dom</code> 192.0.2.2 Ҵߴٰ .
    , <code>def.dom</code> ü DNS Ѵٰ .
      Բ <code>def.dom</code> <code>abc.dom</code>
       ç  ִ ҿ ξ. ׷ٸ ׵
    <code>www.def.dom</code> 192.0.2.1 ϱ⸸ ϸ ȴ.
    ׵ ü DNS ϱ⶧  ׵ ϴµ
    <code>www.def.dom</code> ڵ带 ϴ   
    .</p>

    <p>(ڰ <code>http://www.abc.dom/whatever</code> 
    URL Էϴ 츦 Ͽ) 192.0.2.1   û
    <code>def.dom</code> ȣƮ ϰ ȴ.  ̷
     Ͼ Ϸ ġ  ȣƮ
     û óϴ   ʿϴ.
    <a href="vhosts/details.html"></a> 밭 ִ.</p>
  </div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div>
<div class="section">
<h2><a name="main" id="main">"ּ" ּ</a></h2>
    

    <p>ġ 1.1 <a href="vhosts/name-based.html"≯
    ȣƮ </a> ԵǾ⶧ ġ 
    ϴ ȣƮ IP ּ()  ʿ䰡 .  ּҴ
    (ִٸ)  <code class="directive"><a href="./mod/core.html#servername">ServerName</a></code>
    Ȥ C Լ <code>gethostname</code> (Ʈ
    "hostname" Է  ) ´. ׷  ּҷ
    DNS ˻ Ѵ.   ˻   .</p>

    <p>DNS  ׾  ˻   ٸ
    <code>/etc/hosts</code> ȣƮ   ִ.
    (ǻͰ  õǾٸ Ƹ ̹  ̴.)
    ׸ DNS ϸ  <code>/etc/hosts</code>
    ϴ Ȯ϶. ϴ ü 
    <code>/etc/resolv.conf</code> Ȥ <code>/etc/nsswitch.conf</code>
    ϸ  ̴.</p>

    <p>   DNS ˻ϸ ȵȴٸ
    <code>HOSTRESORDER</code> ȯ溯 "local" ϰ
    ġ   ִ. <code class="module"><a href="./mod/mod_env.html">mod_env</a></code>
    Ͽ ȯ  ʴ´ٸ  ȯ溯
    CGI  ش. ü manpage FAQ ϴ
     .</p>
  </div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div>
<div class="section">
<h2><a name="tips" id="tips">  ϱ </a></h2>
    

    <ul>
      <li>
        <code class="directive"><a href="./mod/core.html#virtualhost">VirtualHost</a></code> IP
        ּҸ ϶
      </li>

      <li>
        <code class="directive"><a href="./mod/mpm_common.html#listen">Listen</a></code>
        IP ּҸ ϶
      </li>

      <li>
         ȣƮ 
        <code class="directive"><a href="./mod/core.html#servername">ServerName</a></code>
         ϶
      </li>

      <li>  ʴ
      <code>&lt;VirtualHost _default_:*&gt;</code> 
      </li>
    </ul>
  </div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div>
<div class="section">
<h2><a name="appendix" id="appendix">η: δ</a></h2>
    

    <p>DNS õ Ȳ ſ ٶ ϴ. ġ 1.2
    츮 DNS  쿡 ּ   
     . · Ͽ  IP ּҸ 䱸ϴ
     ȣ ٽ ؾ  ͳݿ ſ ٶ
    ϴ.</p>

    <p>  񽺵   Ѱ  ˻
    IP ּҿ ٽ DNS ˻ Ͽ  ̸ ϴ ̴.
     ٸ  ȣƮ    ִ.  
    DNS ùٷ Ǿ Ѵ. (FTP  TCP wrapper
    "ߺ-" DNS ˻  ϱ⶧ κ ڿ
    ͼ ̴.)</p>

    <p>· IP ּҸ  DNS   ȣƮ
       ְ   .  Ϻθ ϴ
    Ͱ  κ ذå  ü ʴ ͺ
       ִ.</p>

    <p>HTTP/1.1 ԰  Ͻð <code>Host</code>
      Ƿ IP ȣƮ 
    ʴ   ̴. ׷  ߿
    DNS ˻  ʿ䰡 . ׷ 1997 3 ߿
       ̸ ȣƮ θ 
    ʾҴ.</p>
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