How to enable IPTABLES support in Linux Kernel
You need to recompile kernel to enable IPTABLES support.
Get into the kernel source directory:
# cd /usr/local/src/kernel [download kernel source from kernel.org]
# Copy your current running kernel config.
# make menuconfig
# Copy your current running kernel config.
# make menuconfig
Networking >> Networking options >> Network packet filtering (replaces ipchains) >> IP: Net Filter configurationS >> IP Tables support
# make
# make modules
# make modules_install
# make install
# make modules
# make modules_install
# make install
Move to /boot/grub and then modify your current grub config to load the new kernel.
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