Hi, I receive this packet : 13:59:42.305909 62.46.161.181 > 21.3.4.16: ip 48 (ttl 117, id 28092, len 68) tethereal convert : 2 13:59:42.305909 62.46.161.181 -> 21.3.4.16 IP IPv6 hop-by-hop option (0x00) Bro not event this, possible configure bro for detect this ? Regards Rmkml at Wanadoo.fr PS: Prelude event this.