When I creta an ipset like this: ipset -N SET_MACS bitmap:ip,mac range 0.0.0.0/0 I got kernel panic when run: ipset list Anyway, we need some rules here based on mac address (no matter what ip address the machine have, because some of them are in DHCP). I know that a mac address can be easy cloned, but, still, we need that for some rules... Can we have a set type "mac address" ? Only mac, with no ip? O tried "ipset -N SET_MACS_ADM bitmap:ip,mac range 10.0.0.0/8" too but got: ipset v6.16: The range you specified exceeds the size limit of the set type "ipset -N SET_MACS_ADM bitmap:ip,mac range 10.0.0.0/16" woked... But again, this does not do the job because I need to set a rule based on mac address and dinamic ip addresses. * Using CentOS 6.3 x86_64 with latest updates on VirtualBox (last one too) -- Att... Ricardo Felipe Klein klein.rfk@xxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html