Hi Philip! > You probably have an ip_conntrack module that it is loading still. > Do a lsmod to see. You'll need to delete it (or you might be able > to add something to /etc/modules.conf). Look under > /lib/modules/$(KERNELRELEASE)/kernel/net/ipv4/netfilter/ Thank you for an answer. Unfortunately, this is not correct, because I've build a monolithic kernel without module support. These are the netfilter compononet, I switched on in the kernel: # CONFIG_MODULES is not set # IP: Netfilter Configuration CONFIG_IP_NF_IPTABLES=y CONFIG_IP_NF_MATCH_MULTIPORT=y CONFIG_IP_NF_FILTER=y CONFIG_IP_NF_TARGET_REJECT=y CONFIG_IP_NF_TARGET_LOG=y Maybe there are other ideas? Regards Kurt Tragant