Subnet on Details... https://www.deepreflect.net/tags/subnet/ Recent content in Subnet on Details... Hugo en-US Copyright © 2003 - 2026 Leonardo Rizzi Tue, 30 Jun 2026 03:28:29 +0200 Discovery Subnet with Ping https://www.deepreflect.net/2009/02/08/discovery-subnet-with-ping/ Sun, 08 Feb 2009 03:58:15 +0000 http://blog.deepreflect.net/?p=421 <p>Sometime we need to discover an entire subnet.</p> <p>This is a small script not so fast but easy:</p> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span><span style="color:#75715e">#!/bin/sh </span></span></span><span style="display:flex;"><span>subnet<span style="color:#f92672">=</span>10.10.10. </span></span><span style="display:flex;"><span>addr<span style="color:#f92672">=</span><span style="color:#ae81ff">1</span> </span></span><span style="display:flex;"><span><span style="color:#66d9ef">while</span> <span style="color:#f92672">[</span> $addr -lt <span style="color:#ae81ff">256</span> <span style="color:#f92672">]</span>; <span style="color:#66d9ef">do</span> </span></span><span style="display:flex;"><span>ping -c <span style="color:#ae81ff">1</span> -t <span style="color:#ae81ff">1</span> $subnet$addr /dev/null <span style="color:#f92672">&amp;&amp;</span> echo $subnet$addr Is Alive </span></span><span style="display:flex;"><span>let addr<span style="color:#f92672">=</span>addr+1 </span></span><span style="display:flex;"><span><span style="color:#66d9ef">done</span> </span></span></code></pre></div> Sometime we need to discover an entire subnet.

This is a small script not so fast but easy:

#!/bin/sh
subnet=10.10.10.
addr=1
while [ $addr -lt 256 ]; do
ping -c 1 -t 1 $subnet$addr /dev/null && echo $subnet$addr Is Alive
let addr=addr+1
done
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