Same as function above, but for ipv6

def collect_ip6table(self, tablename):
        """ Same as function above, but for ipv6 """

        modname = "ip6table_"+tablename
        if self.check_ext_prog("grep -q %s /proc/modules" % modname):
            cmd = "ip6tables -t "+tablename+" -nvL"
            self.add_cmd_output(cmd)