---
title: "Access the external server"
slug: "natgw-remote-classic"
tags: ["NAT Gateway"]
updated: 2026-09-17T09:18:17Z
published: 2026-09-17T09:18:17Z
canonical: "guide.ncloud-docs.com/natgw-remote-classic"
stale: true
---

> ## Documentation Index
> Fetch the complete documentation index at: https://guide.ncloud-docs.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Access the external server

Available in Classic

Internal servers with private IP addresses on the NAVER Cloud Platform can access external servers through a NAT Gateway using a representative public IP address. This guide explains how to log in to a customer’s Linux server on the NAVER Cloud Platform using the PuTTY application and then connect to an external server. Proceed through the following steps in order:

[1. Connect to the instance server](/docs/en/natgw-remote-classic#1%EC%9D%B8%EC%8A%A4%ED%84%B4%EC%8A%A4%EC%84%9C%EB%B2%84%EC%A0%91%EC%86%8D) [2. Check the peer-bound private IP address](/docs/en/natgw-remote-classic#2Peer%ED%96%A5%EB%B9%84%EA%B3%B5%EC%9D%B8IP%ED%99%95%EC%9D%B8) [3. Access the external server](/docs/en/natgw-remote-classic#3%EC%99%B8%EB%B6%80%EC%84%9C%EB%B2%84%EC%A0%91%EC%86%8D)

## 1. Connect to the instance server

Run PuTTY, enter the target server’s IP address and port number, and log in.

- The PuTTY executable can be downloaded from [https://www.putty.org/](https://www.putty.org/).
- For detailed information about server access, see [Access Server](/docs/en/server-access-classic).

## 2. Check the peer-bound private IP address

From the **Peer Host** menu of the NAT Gateway, check the peer-bound private IP address corresponding to the public IP of the target server. To check:

1. In the Classic environment of the NAVER Cloud Platform console, navigate to **Menu** > **All Services** > **Networking** > **NAT Gateway**.
2. Click **Peer Host**.
3. From the Peer Host list, check the peer-bound private IP address corresponding to the public IP of the target server.

## 3. Access the external server

From the logged-in server, access the external server using the peer-bound private IP address. The connection is established to the actual peer IP address through the NAT Gateway.

```
$ ssh user ID@Peer-bound private IP
```

              Note

              

You can configure the /etc/hosts file to access the peer IP address using the Peer Host name. To configure:

1. Add a line to the /etc/hosts file by entering the peer-bound private IP address and the Peer Host name, and then save the file.  

Example: `10.10.10.10 my-external-server` Enter
2. Afterward, access the peer IP address using the Peer Host name.  

Example: Connect by entering http://my-external-server instead of http://10.10.10.10.