https://bhuvanchandradv.github.io/tags/networking/ Recent content in Networking on Bhuvan Chandra DV Hugo en Fri, 13 Jun 2014 11:55:43 +0800 https://bhuvanchandradv.github.io/blog/wifi-hotspot-in-linux/ Fri, 13 Jun 2014 11:55:43 +0800 https://bhuvanchandradv.github.io/blog/wifi-hotspot-in-linux/ <p>How to configure an embedded Linux board (Colibri VF61) as a WiFi access point using <code>hostapd</code>, <code>udhcpd</code>, and <code>iptables</code>.</p> <h2 id="test-setup">Test Setup</h2> <ul> <li>Colibri VF61 V1.1A</li> <li>Colibri Evaluation Board V3.1a / Iris V1.1</li> <li>Ambicom WL250N-USB (Ralink RT3070 chipset)</li> </ul> <h2 id="steps-overview">Steps Overview</h2> <ol> <li>Assign a static IP to <code>wlan0</code></li> <li>Configure <code>udhcpd</code> as the DHCP server</li> <li>Configure <code>hostapd</code> as the AP daemon</li> <li>Enable IP forwarding and NAT between <code>wlan0</code> and <code>eth0</code></li> <li>Wire it all up with systemd service files</li> </ol> <h2 id="1-static-ip-for-wlan0">1. Static IP for wlan0</h2> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>ifconfig wlan0 192.168.0.1 up </span></span></code></pre></div><h2 id="2-udhcpd-configuration">2. udhcpd configuration</h2> <p><code>/etc/udhcpd.conf</code>:</p>