Building Kernel Modules

The kernel must be built with the following options enabled, where supported:

• CONFIG_NETFILTER
• CONFIG_KALLSYMS
• EFRM_KALLSYMS_ALL
• CONFIG_FIB_RULES
• CONFIG_IP_MULTIPLE_TABLES.

Standard distributions will already have these enabled, but they must also be enabled when building a custom kernel. These options do not affect performance.

The following commands can be used to install kernel development headers.

• Debian based Distributions - including Ubuntu (any kernel):

  apt-get install linux-headers-$(uname -r)

• For RedHat/Fedora (not for 32 bit kernel):
  • If the system supports a 32 bit kernel and the kernel is PAE, then:

    yum -y install kernel-PAE-devel

  • otherwise:

    yum -y install kernel-devel

• For SuSE:

  yast -i kernel-source