Yasuyuki, I did not see your post until Wednesday. I tried all the methods the Gentoo devs used in their ebuild, but I still get the error, FATAL: module ip_tables not found. I understand from your post that iptables is probably still working correctly despite the errors. I've only begun to learn C, so much of the source I read is still unclear to me. But after reviewing iptables.c, I believe the problem is related to function load_iptables_ko. It is the only new addition to the code that would seem to be creating the problem. Best regards, Harvey