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Oracle Linux: How to Configure IPsec to Secure Site-to-Site Communications Using Libreswan. (Doc ID 2372172.1)

Last updated on JUNE 05, 2020

Applies to:

Oracle Cloud Infrastructure - Version N/A and later
Linux OS - Version Oracle Linux 6.0 and later
Linux x86-64

Goal

This document describes how to configure IPsec (Internet Protocol Security) on Oracle Linux to secure site-to-site communications by using libreswan, which is a variant of openswan. In this scenario, IPsec acts as a tunnel, permitting secure accesses between private networks or sites that are otherwise invisible to one another. Site-to-site connectivity is also referred to as VPN (Virtual Private Network).

Solution

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In this Document
Goal
Solution
 Overview
 Prepare Environment
 Install libreswan
 Configure Basic IKE/IPsec Parameters
 leftsubnet
 rightsubnet
 Configure IPsec for Site-to-Site Connectivity using PSK
 Generate ISAKMP and IPsec SAs
 Verify Site-to-Site Connectivity
 Closing Remarks
References

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