Helo, we use recent to control ip traffic. kernel 2.6.18-308.13.1.el5 : all is OK kernel 2.6.18-308.16.1.el5 : the first recent statement causes an error. E.g.: iptables -A INPUT -m state --state NEW -m recent --set -p tcp --dport 80 iptables: Unknown error 18446744073709551615 The man pages say: recent is supported. CentOS 6: is OK Knows anyone more? Best regards Helmut Drodofsky -- Viele Grüße Helmut Drodofsky Internet XS Service GmbH Heßbrühlstraße 15 70565 Stuttgart Geschäftsführung Dr.-Ing. Roswitha Hahn-Drodofsky HRB 21091 Stuttgart USt.ID: DE190582774 Tel. 0711 781941 0 Fax: 0711 781941 79 Mail: info at internet-xs.de www.internet-xs.de