bon ben ca vient de la configuration de shorewall “/etc/shorewall/shorewall.conf”
DISABLE IPV6
Distributions (notably SUSE) are beginning to ship with IPV6
enabled. If you are not using IPV6, you are at risk of being
exploited by users who do. Setting DISABLE_IPV6=Yes will cause
Shorewall to disable IPV6 traffic to/from and through your
firewall system. This requires that you have ip6tables installed.
DISABLE_IPV6=Yes