# System Requirements for Microsoft Windows DNS and DHCP servers

## Table of Contents

- [Hardware Requirements](https://www.manageengine.com/dns-dhcp-ipam/help/system-requirements-for-microsoft-ddi-dns-and-dhcp-servers.html#hardware-main)
- [Software Requirements](https://www.manageengine.com/dns-dhcp-ipam/help/system-requirements-for-microsoft-ddi-dns-and-dhcp-servers.html#software)
- [Port Requirements](https://www.manageengine.com/dns-dhcp-ipam/help/system-requirements-for-microsoft-ddi-dns-and-dhcp-servers.html#ports)
- [Database Requirements](https://www.manageengine.com/dns-dhcp-ipam/help/system-requirements-for-microsoft-ddi-dns-and-dhcp-servers.html#database)
- [Network Port Configurations](https://www.manageengine.com/dns-dhcp-ipam/help/system-requirements-for-microsoft-ddi-dns-and-dhcp-servers.html#networks)

## Hardware requirements for DDI Central .exe installer- Main server

Based on your network requirements in terms of zones or subnets, the hardware requirements to install DDI Central's Management UI Console vary to ensure optimal performance. Select a configuration tailored to different scales of network size and complexity. The following hardware requirements are mandatory for the server running the Management UI Console installed via the .exe installer:

### Zones < 15 or Subnets < 15

| Parameter | Essential/Professional |
|---|---|
| Processor | 8 CPU Core |
| RAM | 12 GB |
| HDD | 500 GB |
| Operating System | 64 bit |

### Zones > 15 - 100 or Subnets > 15-100

| Parameter | Essential/Professional |
|---|---|
| Processor | 8 CPU Core |
| RAM | 16 GB |
| HDD | 500 GB |
| Operating System | 64 bit |

### Zones > 100 to < 300 or Subnets > 100 to < 300

| Parameter | Essential/Professional |
|---|---|
| Processor | 16 CPU Core |
| RAM | 32 GB |
| HDD | 1 TB |
| Operating System | 64 bit |

### Zones > 300 or Subnets > 300

| Parameter | Essential/Professional |
|---|---|
| Processor | 32 CPU Core |
| RAM | 64 GB |
| HDD | 1 TB |
| Operating System | 64 bit |

## Software Requirements for Discovery Node Agent

Here are the minimum software requirements needed to install the Windows Lightweight Node Agent on your Windows DNS/DHCP servers.

|  |  |
|---|---|
| Mimimum configurations | 6V CPU |
| Minimum RAM | 8 GB |
| Disc Space | 100 GB |

## Software Requirements

| Software | Minimum Versions Required for Evaluation | Version Requirements for Production |
|---|---|---|
| Microsoft Windows Server OS | Microsoft Windows Server OS versions 2016, 2019, and 2022 | Microsoft Windows Server OS versions 2016, 2019, and 2022 |
| Microsoft Windows Server OS | PowerShell versions: 5.1, 6.0, 6.1, 6.2, 7.0, 7.1, 7.2, 7.3, and 7.4 | PowerShell versions: 5.1, 6.0, 6.1, 6.2, 7.0, 7.1, 7.2, 7.3, and 7.4 |
| Browsers | Chrome/ Firefox/ Edge | Chrome (preferred)/ Firefox/ Edge |
| Windows Runtime Environment | Microsoft Visual C++ Redistributable versions 2015, 2017, 2019, and 2022 | Microsoft Visual C++ Redistributable versions 2015, 2017, 2019, and 2022 |

## Port Requirements for WinRM authentication

These ports are used for Windows Remote Management (WinRM) authentication, enabling successful remote access and management of Windows servers.

| Port Name | Port Number | Protocol | Usage | Connection |
|---|---|---|---|---|
| HTTPS port | 5986 | TCP | Secure port used for encrypted WinRM communication between the DDI Central Management UI Console and the Windows server. | Inbound |
| HTTP port | 5985 | TCP | Non-encrypted port used for WinRM communication between the DDI Management UI Console and the Windows server. | Inbound |

## DDI Central Application Specific Port Requirements

These ports are specific to DDI Central, handling web-based management, database communication, and real-time updates.

| Port Name | Default Port Numbers | Protocol | Usage | Connection |
|---|---|---|---|---|
| Web server port | 9090 | TCP | Provides access to the DDI Central Management UI Console via a web browser, enabling users to configure and manage DDI services | Inbound |
| Embedded database port | 33306 | TCP | Enables communication with the embedded PostgreSQL database used by DDI Central for data storage and retrieval | N/A |
| HTTPS Port | 9443 | TCP | Used by DDI Central's Management UI console to securely connect with Windows DNS/DHCP server(s), ensuring encrypted communication for monitoring and management tasks. | Inbound |
| Web Socket | 8001 | TCP | Enables real-time updates and live monitoring between DDI Central and connected servers. | Bidirectional |

## Database Requirements

PostgreSQL comes bundled with the product.

**Note:** In case of failover, please use PostgreSQL with replication configured.

## Network Port Configurations

To ensure optimal performance and seamless operation of DDI Central on your Windows environment, the following network port configurations are required:

### DNS (Domain Name System)

- **TCP and UDP Port 53:** Must be open for DNS query and response traffic. DNS uses this port for both TCP and UDP protocols to handle standard query and response action, as well as zone transfers (TCP).

### DHCP (Dynamic Host Configuration Protocol)

- **UDP Port 67 (Primary DHCP):** Must be open for receiving DHCP discovery requests from DHCP clients.This is the standard port on which the DHCP server listens for and responds to DHCP discovery messages and other requests from clients.
- **TCP Port 647 (DHCP Failover):** Must be open to enable communication between primary and secondary DHCP servers in a failover configuration. This port is used for synchronization of DHCP lease information and other configuration data to ensure continuity and consistency of DHCP services in case one of the servers becomes unavailable.

These port configurations are essential to allow the DDI system to communicate effectively within your network infrastructure. Ensure that any firewalls or network security systems are configured to permit traffic on these ports for the DDI solution's components.