As a system administrator, I need to configure a basic IPsec VPN connection using Libreswan. Navigate to the `ipsec.conf(5)` manual page. What is the primary purpose of this configuration file? Identify at least three common configuration options or sections mentioned in the documentation that are essential for defining an IPsec connection.
Navigate to 'libreswan.org'. Click on the 'Documentation' link. Click on the 'All Manual pages' link (ID 29). From the `libreswan(8)` page, locate and click on the `ipsec.conf(5)` link (ID 25). Identify the primary purpose of the `ipsec.conf` file from its description. Scan the page for common configuration options or sections (e.g., `conn`, `left`, `right`, `authby`, `ike`, `esp`). List at least three essential configuration options or sections found on the page. Synthesize the purpose of the file and the identified configuration options.
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 define IPsec connections and global settings. The agent identifies and lists at least three essential configuration options or sections such as `conn`, `left`, `right`, `authby`, `ike`, `esp`, or `config setup`.