IPv4-mapped Address Pros/Cons

• Pros

  • Easy to convert IPv4 applications to IPv6

• Cons

  • Complexity of kernel
  • Complexity of access control
    • People usually build access control using IPv4 address
  • Note: “Some” systems do not support this...
    • OpenBSD, NetBSD (by default), FreeBSD 6.x (by default), Windows

Notes: