.. _dhcp-networks-sensor:

Configuring DHCP Server
==========================

The Dynamic Host Configuration Protocol (DHCP) is a standardized network
protocol used on IP networks. The DHCP is controlled by the Policy
Server/Sensor that dynamically distributes network configuration parameters,
such as IP addresses. You will be able to configure and manage the Built-In
DHCP Options and configure Policy Server/Sensor to utilize the three DHCP
Services. (Local, Remote, and Local & Remote)

.. list-table::
   :widths: 2 7 3
   :header-rows: 1

   * - Topics
     - Description
     - etc
   * - Local
     - Provides DHCP service for the network sensor's management scope
     -
   * - Remote
     - The network sensor does not provide DHCP services. the remote server provides DHCP services.
     - Switch requires DHCP Helper Address setting
   * - Local & Remote
     - Provides DHCP service to the network sensor's management scope and Local IP band for remote network sensors
     -

.. image:: /images/Genian-NAC-DHCP-Options-1.png
   :width: 700px

To Configure DHCP Services To Network Sensor In Operation
---------------------------------------------------------

#. Go to **System** in the top panel
#. Go to **System > Sensor** in the left System Management panel
#. Find and click **IP/Name** of **Network Sensor**
#. Find and click **Settings** tab
#. Click **Sensor Settings**
#. Find **DHCP** section and select **On** in **DHCP Service**
#. Based off of your network environment, choose one of the **Service Target**
   below
#. Find **Node IP Pool** section and **reserve** an **IP range** of IP
   Addresses (*e.g.192.168.10.2-100*)
#. Find **Lease Duration** and define when an **IP expires** (*Minutes, Hours,
   Days, or Months*)
#. All **other settings** are **optional:**

   - DNS Server
   - Domain Name
   - WINS Server
   - NTP Server
   - Sensor IP Pool
   - IP Assignment-Prevention Target
   - DHCP Option
   - Static DHCP

#. Click **Update**

DHCP service only on policy server
-------------------------------------

This section is used in a remote environment in which the network environment is a DHCP environment, the principal policy Server as a DHCP server, and the network sensor is a remote operating environment.

#. Go to **System** in the top panel
#. On the right screen, click the IP of the policy server.
#. On the Sensors tab, click Sensor Settings.
#. In the DHCP entry, set it as follows:

    - DHCP Service: On
    - Service Target: Local & Remote
    - Node IP Pool: Remote DHCP Set Network Sensor IP Scope
    - Set other custom settings as well.

5. Go to the left panel System > System Defaults > Network Sensor.
6. On the sensor setup screen, set it as below.

    - DHCP Service: On
    - Service Target: Remote

        - The current sensor does not provide DHCP server functionality, but provides DHCP services from other servers.

7. Click **Update**