I'm setting up a new IPsec VPN connection using Libreswan and need to understand the `ipsec.conf` file. What is the main purpose of this file? Describe the two primary types of sections found within it. Additionally, explain the concept of 'left' and 'right' participants in a connection definition and state the default value for the `keyexchange` parameter.
Navigate to 'libreswan.org'. Click on the 'Documentation' link. Click on the 'All Manual pages' link. From the `libreswan(8)` page, locate and click on the `ipsec.conf(5)` link. Identify the primary purpose of the `ipsec.conf` file from its description. Identify and describe the two primary types of sections (`config` and `conn`). Locate and explain the concept of 'left' and 'right' participants in a connection. Find the default value for the `keyexchange` parameter within the `conn` section. Synthesize all gathered information to answer the task.
The agent successfully navigates to the `ipsec.conf(5)` manual page. The agent states that `ipsec.conf` is the main configuration file for Libreswan, used to specify most configuration and control information for the IPsec subsystem. The agent describes the two primary section types as `config` (for general configuration) and `conn` (for defining IPsec connections). The agent explains that 'left' and 'right' participants define the two endpoints of an IPsec connection, noting that the choice of which is 'left' or 'right' is arbitrary, and `left` is conventionally used for the local side while `right` is for the remote side. The agent states that the default value for the `keyexchange` parameter is `ikev2`.