genkernel should set CONFIG_IP_NF_NAT by default everything is enabled but CONFIG_IP_NF_NAT is not... also tested on 3.4.52.4-r2 (same thing) the way to solve the problem: echo "CONFIG_IP_NF_NAT=m" >> /usr/share/genkernel/arch/x86_64/generated-config for x86 also echo "CONFIG_IP_NF_NAT=m" >> /usr/share/genkernel/arch/x86/generated-config
This is already changed in the 3.5 series, and was disabled for good reason in the older kernels; not changing in the 3.4 series now.