TUN/TAP VPNs
  VTun
  Uses PSK authentication
  vtund user space daemon provides crypto
  Can also tunnel
  Serial link, for example PPP
  Pipes (connect tar output directly to other machine securely, for example)
  tinc
  Uses pubkey authentication
  Automatically adds other tinc routes 
  Works on Solaris too
  Port 665 is officially blessed by IANA

Copyright 2003, Bri Hatch of Onsight, Inc.

Presented at Real World Linux, 2003.

Presentation created using vim and MagicPoint.