Updating Debian Etch Kernel to support Layer7

Edit your /etc/apt/source.list file

Then add the following Debian software repository

deb http://ftp.de.debian.org/debian etch main contrib non-free
deb-src http://ftp.de.debian.org/debian etch main contrib non-free
deb http://www.backports.org/debian etch-backports main contrib non-free

and update it using this command:

Update your server

Download some packages needed for compiling the kernel in Debian Etch.

Download the Kernel version 2.6.25 from www.kernel.org

Download the iptables version 1.4.0

Download the layer7 version 2.20 and the layer7 protocols

Download the IPP2P package

Untar all the packages and create a symlink of newly downloaded kernel and iptables to your /usr/src directory.

Go to your newly downloaded kernel directory which is /usr/src/linux and patch it with Layer7 patch to support Layer7 packet filtering.

Copy your previous kernel configuration

Start compiling the new Kernel using this command.

An ncurses-based configuration menu will appear on the screen.

Select Load an alternate configuration file

and select .config

Got to Networking –> Networking options –> Network packet filtering framework (Netfilter) –> Core netfilter configuration

then select

<M> Netfilter connection tracking support

And enable Layer7 support

<M> “layer7″ match support
[*] Layer 7 debugging output

select exit and go to IP: Netfilter Configuration

Enable NAT

<M> IPv4 connection tracking support (required for NAT)
<M> Full NAT

Save your new Kernel configuration and type this commands:

Compiling your new Kernel will take time depending on your processor speed. After the compilation, you can install now your new Kernel.

Restart your system.