Availability (1/2)

• In theory IPsec can be implemented in any device which includes a TCP/IP stack

  • Mandatory in IPv6 / optional in IPv4

• Operating systems

  • Unix:
    • Native implementations in
      • OpenBSD
      • AIX (since version 4.3)
      • Solaris (since version 8)
    • KAME (www.kame.net) for *BSD
      • Included in FreeBSD ³ 4.1
    • FreeS/WAN (www.freeswan.org) for Linux
  • Windows:
    • Native implementation in Windows 2000
    • VPN+ by F-secure
    • PGPnet by Network Associates
    • …