Le ven 23/05/2003 à 16:41, Leszek Åur a Ãcrit : > Slackware 9.0 > kernel 2.4.20 > iptables 1.2.7a > iptables -t nat -A OUTPUT -d 1.1.1.1 -j DNAT --to-destination 2.2.2.2 > iptables: Invalid argument Strange, works fine for me : cbr@xxxxxxx:~$ sudo iptables --version iptables v1.2.7a cbr@xxxxxxx:~$ sudo iptables -t nat -A OUTPUT -d 1.1.1.1 -j DNAT --to-destination 2.2.2.2 cbr@xxxxxxx:~$ sudo iptables -t nat -L Chain PREROUTING (policy ACCEPT) target prot opt source destination Chain POSTROUTING (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination DNAT all -- anywhere 1.1.1.1 to:2.2.2.2 Are both kernel and iptables Slackware packages ? Are they built from sources ? If so, does patch-o-matic have been applied (pending and submitted) ? I got problems like this when I was used to build my own kernel and use an iptables package from distro. -- CÃdric Blancher <blancher@xxxxxxxxxxxxxxxxxx> IT systems and networks security - Cartel SÃcurità Phone : +33 (0)1 44 06 97 87 - Fax: +33 (0)1 44 06 97 99 PGP KeyID:157E98EE FingerPrint:FA62226DA9E72FA8AECAA240008B480E157E98EE