Hi All Now I am using iptables v1.2.11, 2.6.9 kernel, and glibc-2.3.4 But I can not use iptables. Following error message. ip_tables: (C) 2000-2002 Netfilter core team iptables v1.2.11: can't initialize iptables table `filter': Module is wrong version Perhaps iptables or your kernel needs to be upgraded. # lsmod Module Size Used by Not tainted iptable_filter 2368 0 - Live 0xbf007000 ip_tables 20640 1 iptable_filter, Live 0xbf000000 How can I use iptables on 2.6.9 kernel ? I think that getsockopt has error in TC_INIT. Best regards Kazuo Nakamura