Openswan
From Wikipedia, the free encyclopedia
Openswan is a complete IPsec implementation for Linux 2.0, 2.2, 2.4 and 2.6 kernels.
Openswan began as a fork of the now-defunct FreeS/WAN project, and continues to be released freely under the GNU General Public License. Unlike the FreeS/WAN project, it is not developed exclusively for the Linux operating system.