https://homelab.nbkelley.com/tags/dhcp/ Recent content in Dhcp on homelab Hugo en Tue, 25 Mar 2025 00:00:00 +0000 https://homelab.nbkelley.com/docs/networking/opnsense_dhcp/ Tue, 25 Mar 2025 00:00:00 +0000 https://homelab.nbkelley.com/docs/networking/opnsense_dhcp/ <h1 id="opnsense-dhcp-configuration">OPNsense DHCP Configuration<a class="anchor" href="#opnsense-dhcp-configuration">#</a></h1> <h2 id="what-was-established">What Was Established<a class="anchor" href="#what-was-established">#</a></h2> <p>Procedures for modifying DHCPv4 ranges and identifying other network segments where IP assignment ranges must be managed to prevent conflicts.</p> <h2 id="key-decisions">Key Decisions<a class="anchor" href="#key-decisions">#</a></h2> <ul> <li><strong>DHCP Scope Management</strong>: Always ensure static leases or reserved IPs (like Proxmox) are excluded from the dynamic DHCP range to prevent IP conflicts.</li> <li><strong>Subnet Alignment</strong>: DHCP ranges must reside within the defined subnet (e.g., <code>/24</code> for <code>192.168.0.0/24</code>).</li> </ul> <h2 id="current-configuration">Current Configuration<a class="anchor" href="#current-configuration">#</a></h2> <h3 id="dhcpv4-modification">DHCPv4 Modification<a class="anchor" href="#dhcpv4-modification">#</a></h3> <ol> <li>Navigate to <strong>Services → DHCPv4 → [Interface]</strong>.</li> <li>Under <strong>General DHCP Options</strong>, set the <strong>Range</strong> (Start and End IP).</li> <li><strong>Save</strong> and <strong>Apply</strong>.</li> </ol> <h3 id="other-assignment-areas-to-monitor">Other Assignment Areas to Monitor<a class="anchor" href="#other-assignment-areas-to-monitor">#</a></h3> <ul> <li><strong>DHCPv6</strong>: Found under <code>Services → DHCPv6 → [Interface]</code>.</li> <li><strong>VPNs</strong>: <ul> <li>OpenVPN: <code>VPN → Open/IPsec → [Server]</code> (Tunnel Network).</li> <li>WireGuard: Manual assignment per peer.</li> </ul> </li> <li><strong>VLANs</strong>: Each VLAN interface requires its own DHCP scope.</li> </ul> <h2 id="historical-notes">Historical Notes<a class="anchor" href="#historical-notes">#</a></h2> <p>As of March 2025, this covers the standard DHCPv4/v6 setup for the LAN and VLAN interfaces.</p>