Openswan works fine for me with L2TP. If you can connect to the L2TPd, then the IPSec part should be fine. I expect that you are having either a firewall or a routing issue.
Stephan
I have not used Openswan 1.03 or Smoothwall with the Mac but I had some success with with its predecessor SuperFreeS/WAN:
http://www.jacco2.dds.nl/networking/freeswan-panther.html
Jacco
-- Stephan Scholz <[EMAIL PROTECTED]> | Development Astaro AG | www.astaro.com | Phone +49-721-490069-0 | Fax -55
Awards for ASL: - Nätverk & Kommunikation Magazine, Sweden: "Five Stars" - October 2003 - Linux Enterprise Readers' Choice Award: Best Firewall - October 2003 - LinuxWorld Product Excellence Award: Best Security Solution - August 2003 - "Excellent" Infoworld Magazine - August 2003