Linux IPv6 HOWTO (en)
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# 18.2. Preparation

This step is only needed if distributed kernel and netfilter doesn't fit your requirements and new features are available but still not built-in.

## 18.2.1. Get sources

Get the latest kernel source: http://www.kernel.org/

Get the latest iptables package:

- Source tarball (for kernel patches): http://www.netfilter.org/

## 18.2.2. Extract sources

Change to source directory:

    # cd /path/to/src

Unpack and rename kernel sources

    # tar z|jxf kernel-version.tar.gz|bz2
    # mv linux linux-version-iptables-version+IPv6

Unpack iptables sources

    # tar z|jxf iptables-version.tar.gz|bz2

## 18.2.3. Apply latest iptables/IPv6-related patches to kernel source

Change to iptables directory

    # cd iptables-version

Apply pending patches

    # make pending-patches KERNEL_DIR=/path/to/src/linux-version-iptables-version/

Apply additional IPv6 related patches (still not in the vanilla kernel included)

    # make patch-o-matic KERNEL_DIR=/path/to/src/linux-version-iptables-version/

Say yes at following options (iptables-1.2.2)

- ah-esp.patch

- masq-dynaddr.patch (only needed for systems with dynamic IP assigned WAN connections like PPP or PPPoE)

- ipv6-agr.patch.ipv6

- ipv6-ports.patch.ipv6

- LOG.patch.ipv6

- REJECT.patch.ipv6

Check IPv6 extensions

    # make print-extensions
    Extensions found: IPv6:owner IPv6:limit IPv6:mac IPv6:multiport

## 18.2.4. Configure, build and install new kernel

Change to kernel sources

    # cd /path/to/src/linux-version-iptables-version/

Edit Makefile

    - EXTRAVERSION =
    + EXTRAVERSION = -iptables-version+IPv6-try

Run configure, enable IPv6 related

                Code maturity level options
                      Prompt for development and/or incomplete code/drivers : yes
                Networking options
                      Network packet filtering: yes
                      The IPv6 protocol: module
                           IPv6: Netfilter Configuration
                                 IP6 tables support: module
                                 All new options like following:
                                       limit match support: module
                                       MAC address match support: module
                                       Multiple port match support: module
                                       Owner match support: module
                                       netfilter MARK match support: module
                                       Aggregated address check: module
                                       Packet filtering: module
                                            REJECT target support: module
                                            LOG target support: module
                                       Packet mangling: module
                                       MARK target support: module

Configure other related to your system, too

Compilation and installing: see the kernel section here and other HOWTOs

## 18.2.5. Rebuild and install binaries of iptables

Make sure, that upper kernel source tree is also available at /usr/src/linux/

Rename older directory

    # mv /usr/src/linux /usr/src/linux.old

Create a new softlink

    # ln -s /path/to/src/linux-version-iptables-version /usr/src/linux

Rebuild SRPMS

    # rpm --rebuild /path/to/SRPMS/iptables-version-release.src.rpm

Install new iptables packages (iptables + iptables-ipv6)

- On RH 7.1 systems, normally, already an older version is installed, therefore use "freshen"

    # rpm -Fhv /path/to/RPMS/cpu/iptables*-version-release.cpu.rpm

- If not already installed, use "install"

    # rpm -ihv /path/to/RPMS/cpu/iptables*-version-release.cpu.rpm

- On RH 6.2 systems, normally, no kernel 2.4.x is installed, therefore the requirements don't fit. Use "--nodeps" to install it

    # rpm -ihv --nodeps /path/to/RPMS/cpu/iptables*-version-release.cpu.rpm

Perhaps it's necessary to create a softlink for iptables libraries where iptables looks for them

    # ln -s /lib/iptables/ /usr/lib/iptables

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