Chapter 1 What’s New for FortiOS 5.0 : New features in FortiOS 5.0 Patch 4 : Blocking IPv6 packets by extension headers
  
Blocking IPv6 packets by extension headers
FortiOS can now block IPv6 packets based on the extension headers, using the CLI syntax config firewall ipv6-eh-filter.
The following commands are now available:
set hop-opt {disable | enable}: Block packets with Hop-by-Hop Options header.
set dest-opt {disable | enable}: Block packets with Destination Options header.
set hdopt-type <integar>: Block specific Hop-by-Hop and/or Destination Option types (maximum 7 types, each between 0 and 255).
set routing {disable | enable}: Block packets with Routing header.
set routing-type <integar>: Block specific Routing header types (maximum 7 types, each between 0 and 255).
set fragment {disable | enable}: Block packets with Fragment header.
set auth {disable | enable}: Block packets with Authentication header.
set no-next {disable | enable}: Block packets with No Next header.