---
title: private network
description: "[private network](https://bestnetllc.co.jp/en/encyclopedia/private-network-en/) Configuration Guide This guide explains how to order a [private network](https://bestnetllc.co.jp/en/encyclopedia/private-network-en/) (Private IP / Subnet) through the [client portal](https://bestnetllc.co.jp/en/encyclopedia/client-portal-en/) and assign private IPs to servers in BESTNET-CLOUD and BESTNET-VPS. ## Overview This guide explains how to order a…"
url: "https://bestnetllc.co.jp/en/docs/private-network/"
updated: "2026-10-19"
category: "BESTNET-CLOUD"
---

# private network

[private network](https://bestnetllc.co.jp/en/encyclopedia/private-network-en/) Configuration Guide

This guide explains how to order a [private network](https://bestnetllc.co.jp/en/encyclopedia/private-network-en/) (Private IP / Subnet) through the [client portal](https://bestnetllc.co.jp/en/encyclopedia/client-portal-en/) and assign private IPs to servers in BESTNET-CLOUD and BESTNET-VPS.

## Overview

This guide explains how to order a [private network](https://bestnetllc.co.jp/en/encyclopedia/private-network-en/) (Private IP / Subnet) through the [client portal](https://bestnetllc.co.jp/en/encyclopedia/client-portal-en/) and assign private IPs to servers in BESTNET-CLOUD and BESTNET-VPS.

## Prerequisites

- You must be logged into the [client portal](https://bestnetllc.co.jp/en/encyclopedia/client-portal-en/)
- Before using a [private network](https://bestnetllc.co.jp/en/encyclopedia/private-network-en/) (Private IP / Subnet), you must first “order” the Private-IP product

## Ordering a [private network](https://bestnetllc.co.jp/en/encyclopedia/private-network-en/) (Private IP)

### 1BESTNET-CLOUD: Order a Private IP (Subnet)

1. Open the order screen from “Order” at the top of the screen.
2. Select **BESTNET-CLOUD_PRIVATE-IP** from the product list.
3. Select the required size (e.g., /24) in **IPv4 Subnet size**.
4. Click **Order** at the bottom of the screen.

![Screen to select BESTNET-CLOUD Private IP product and specify subnet size](https://bestnetllc.co.jp/wp-content/uploads/2025/12/02-cloud-order-private-ip-select-size.png)

### 2BESTNET-VPS: Order a Private IP (Subnet)

1. Open the order screen from “Order” at the top of the screen.
2. Select **BESTNET-VPS_PRIVATE-IP** from the product list.
3. Select the required size (e.g., /24) in **IPv4 Subnet size**.
4. Click **Order** on the right side (or bottom) of the screen.

![Screen to select BESTNET-VPS Private IP product and specify subnet size](https://bestnetllc.co.jp/wp-content/uploads/2025/12/03-vps-order-private-ip.png)

## Assigning Private IPs to Existing Servers

### 3BESTNET-CLOUD: Assign Private IP to an Existing Server

1. Open the target server and open **Network > Interfaces** from the left menu.
2. Click **Add New Network Interface**.
3. From the **IPv4 addresses** dropdown, select the private subnet you want to assign (e.g., 10.100.2.0/24).
4. Click **Assign new IP** to reserve an IP.
5. Click **Add New Network Interface** to apply the changes.
6. Verify that the private IP has been added in the IP field of the server details screen.

![Adding a new network interface from BESTNET-CLOUD Network > Interfaces screen](https://bestnetllc.co.jp/wp-content/uploads/2025/12/04-cloud-interface-list-add-button.png)
Add from Network > Interfaces.

![Selecting a private subnet in BESTNET-CLOUD and executing Assign new IP](https://bestnetllc.co.jp/wp-content/uploads/2025/12/05-cloud-add-interface-select-subnet.png)
Select the private subnet and execute Assign new IP.

![Verifying that private IP has been added in BESTNET-CLOUD server details](https://bestnetllc.co.jp/wp-content/uploads/2025/12/06-cloud-server-ip-confirm.png)
Verify that the private IP has been added in the IP field of server details.

### 4BESTNET-VPS: Assign Private IP to an Existing Server

1. Open the target VPS and open **Network > Interfaces** from the left menu.
2. Click **Add New Network Interface**.
3. From the **IPv4 addresses** dropdown, select the private subnet you want to assign.
4. Click **Assign new IP** to reserve an IP.
5. Click **Add New Network Interface** to apply the changes.
6. Verify that the private IP has been added in the interfaces list.

![Adding a new network interface from BESTNET-VPS Network > Interfaces screen](https://bestnetllc.co.jp/wp-content/uploads/2025/12/07-vps-interface-list-add-button.png)
Similarly for VPS, add from Network > Interfaces.

![Selecting a private subnet in BESTNET-VPS and executing Assign new IP](https://bestnetllc.co.jp/wp-content/uploads/2025/12/08-vps-add-interface-select-subnet.png)
Select the subnet from the dropdown and execute Assign new IP.

![Verifying that private IP has been assigned in BESTNET-VPS interfaces list](https://bestnetllc.co.jp/wp-content/uploads/2025/12/09-vps-interface-list-confirm.png)
Verify that the private IP has been assigned in the interfaces list.

## Using a Common [private network](https://bestnetllc.co.jp/en/encyclopedia/private-network-en/) Between BESTNET-CLOUD and BESTNET-VPS

To use a common [private network](https://bestnetllc.co.jp/en/encyclopedia/private-network-en/), select the **same private subnet (e.g., 10.100.2.0/24)** on both the BESTNET-CLOUD side and BESTNET-VPS side and add interfaces.

Configuration Points

Cloud Side

- Open Network > Interfaces
- Select the same subnet such as `10.100.2.0/24`

VPS Side

- Open Network > Interfaces
- Select the same subnet such as `10.100.2.0/24`

![Diagram showing BESTNET-CLOUD and BESTNET-VPS using a common private subnet](https://bestnetllc.co.jp/wp-content/uploads/2025/12/Gemini_Generated_Image_qe3lnzqe3lnzqe3l-1.png)

## Adding a New Server with a Private IP (Conceptual Approach)

1. From the BESTNET-CLOUD instances list, create a server using **Add New Server**.
2. After server creation, follow the same procedure as “Assigning Private IPs to Existing Servers” to assign a private subnet.

The approach to joining a [private network](https://bestnetllc.co.jp/en/encyclopedia/private-network-en/) is the same whether for existing or newly created servers. Select the subnet you want to use and add it to the network interface.