Thanks a lot for your answer. Here is my /proc/net/ip_tables_target: TTL ULOG LOG SAME NETMAP REDIRECT MASQUERADE IMQ ECN TOS REJECT DNAT SNAT ERROR TCPMSS NFLOG NFQUEUE MARK MARK DSCP CONNMARK CLASSIFY First, i can see that the target ROUTE is not available. Second, what about the line with ERROR? Is it normal ? I have checked on an other linux box with ROUTE target working, there is no ERROR line in the ip_tables_target file and the ROUTE target is available. What can i do to correct the ROUTE target available ? Best regards, Ludovic.