# Integration of Check Point VPN-1®/Firewall-1® and FreeBSD IPsec

### Jon Orbeton

`<jono@securityreports.com>`

### Matt Hite

`<mhite@hotmail.com>`

Copyright © 2001, 2002, 2003 Jon Orbeton

$FreeBSD: release/9.1.0/en_US.ISO8859-1/articles/checkpoint/article.sgml 38826 2012-05-17 19:12:14Z hrs $

This document explains how to configure a VPN tunnel between FreeBSD and Check Point's VPN-1®/ Firewall-1®. Other documents provide similar information, but do not contain instructions specific to VPN-1/Firewall-1 and its integration with FreeBSD. These documents are listed at the conclusion of this paper for further reference.

[ Split HTML / Single HTML ]

# 1 Prerequisites

The following is a diagram of the machines and networks referenced in this document.

The FreeBSD gateway GW serves as a firewall and NAT device for internal nets.

The FreeBSD kernel must be compiled to support IPsec. Use the following kernel options to enable IPsec support in your kernel:

    options         IPSEC
    options         IPSEC_ESP
    options         IPSEC_DEBUG

For instructions on building a custom kernel, refer to the FreeBSD handbook. Please note that IP protocol 50 (ESP) and UDP port `500` must be open between the Firewall-1 host and the FreeBSD GW.

Also, racoon must be installed to support key exchange. Racoon is part of the FreeBSD ports collection in `security/racoon`. The racoon configuration file will be covered later in this document.

|  | Next
|  | Firewall-1 Network Object Configuration