ipfw doesn't support IPv6 PPTP VPN (IPFW2: IPV6 - Unknown Extension Header(47))

[Olivier Cochard-Labbé]

2011/9/30 Alexander Motin <mav at freebsd.org>:
> Quick look on ipfw kernel sources shown sysctl controlling that:
> net.inet6.ip6.fw.deny_unknown_exthdrs. You may try set it to zero.
>

Thanks a lot's !
This solve the first problem: My IPv6 tunnel is permit again.
Need to found how to prevent the log message because my console is
still full of "IPFW2: IPV6 - Unknown Extension Header(47), ext_hd=0".

Regards,

Olivier