This is a duplicate report, Freitas reported it first on this list Feb 2. I'm using kernel version 2.6.20 on an x86 based system. Iptables emits errors, "FATAL: module ip_tables not found" when ip_tables is built in the kernel. The only workaround is to build ip_tables as a module. If iptables is being developed to be used ONLY as a module, you might include a note in the INSTALL document to alert the users. Best regards, Harvey