freebsd-dev/contrib/ipfilter/INSTALL.Linux

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IP-Filter on Linux 2.0.31
-------------------------
NOTE: I have *ONLY* compiled and created patches for using IP Filter on
Linux 2.0.31. Any other kernel revision may need seprate patches.
Also, I've only tested on a x86 CPU so I can't make any guarantees
about it working on Sparc/Mac/Amiga.
First, you should do a sanity check of your system to make sure it will
compile IP Filter. You will need a "libfl" and a "libelf". If you don't
have these, install them before proceeding.
The installation and compiliation process assumes that Linux 2.0.31
will be in the /usr/src/linux directory and that all the symbolic links
in /usr/include match. /usr/src/linux may be a symbolic link too, but
it must point to a 2.0.31 kernel source tree.
The first step is to make the IP Filter binaries. Do this with a
"make linux" from the ip_fil3.2.x directory. If this completes with
no errors, install IP Filter with a "make install-linux".
Now that the user part of it is complete, it is time to work on the kernel.
To start this off, run "Linux/minstall". This will configure the devices
you will need for the IP Filter. Then run "Linux/kinstall". This will
patch your kernel source code and configuration files so you can enabled IP
Filter. You must now go to /usr/src/linux and configure your kernel using one
of the available interfaces to enable IP Filter. IP Filter will be presented
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as a three way choice "y/m/n" - select "m" to enable it. Save your kernel
configuration file, rebuild, install and reboot with the new kernel.
When you've rebooted with the new kernel, you should be able to load
IP Filter with the command "insmod if_ipl". All going will, you will
see a message like this on your console:
IP Filter: initialized. Default = pass all, Logging = enabled
indicating that IP Filter has successfully been loaded into the kernel
and is awaiting.
Darren
Features Not Available on Linux, yet:
- compiled into the kernel
"<action> in on <if> to <if> ..."
"<action> in on <if> dup-to <if> ..."
"<action> in on <if> fastroute ..."
"block return-rst ..."
"map ... proxy ..." (Linux's masquerading is better at present)