How to Install fprobe (Netflow) Tool on IPFire Firewall

This tutorial is about the compilation and installation of NetFlow tool (fprobe) on the IPFire firewall. Fprobe  is libpcap based tool which collects network traffic data and emit output as flows (NetFlow) towards the specified collector. NetFlow protocol supported devices collects all IP traffic and forward the collected data to a server for further analysis ( such as source & destination of traffic, bandwidth consumption of IP's etc).

NetFlow protocol is not supported by IPFire firewall however fprobe addon can be used on IPFire. So in this tutorial, fprobe tool will be compiled and installed on the IPFire environment. Already created lfs script is used in this detailed compilation guide. LFS script is required for the compilation of new addon on IPFire.

Environment setup

First setup IPFire development system using our previous article on compile IPFire firewall on Ubuntu 14.04. IPFire development environment setup for Ubuntu 16.04 is almost same.


Before compilation of addon for IPFire system, it can be installed in the test environment or shell which is also provided by IPFire build system.

  • First, copy desired package or software in the cache directory under ipfire-2.x directory
  •  run ./make shell command to get shell for test installation of package (fprobe).
getting inside lfs chroot
  •  extract new addon and get inside the /usr/src/cache/frobe-1.1 directory.
  •  run ./configure script to check per-requisite of package  as shown in below figure.
  • pcap.h is not found on the development system.
pcap is not available
  • Fprobe tool is based on libpcap so following development library should be available on the build system.
apt-get install libpcap-dev
libpcap installation

Make sure "pcap" directory must exist on the development system under  ipfire-2.x/build/usr/include/pcap.

pcap under build

Following snapshot shows required pcap dependency is found on the development system.

libpcap found

Fprobe Compilation

Compilation of new addon on the IPFire development environment required lfs compilation script (fprobe) under ipfire-2.x\lfs directory and addition of script in the build script

Already created compilation script of fprobe is used for the package (fprobe-1.1.tar.bz2) and copy it under lfs directory inside the ipfire-2.x.

lfs fprobe

As shown below, compilation script of fprobe tool is inside the lfs directory .


Changes in the build script is shown below.


Run following build command to include new addon in the IPFire system. However, build command will be run two times for the compilation of addon for IPFire environment.

./ build
1st build

The output of first build shows that rootfile of fprobe is missing.

1st build_output

As shown in the above figure that the addon rootfile name is same as the name of package  (fprobe-1.1) .

As shown below, rootfile of the addon is inside the log directory. Copy rootfile fprobe-1.1 into config/rootfiles/packages and rename it as lfs of  fprobe package name.

cp log/fprobe-1.1 config/rootfiles/packages/fprobe

The output of the install script or make install command (files or folder created or removed) is stored int the  package rootfile. Following sed command removes "+" sign from the package rootfile.

sed -i 's/+//g' config/rootfiles/packages/fprobe


PakFire is used on the IPFire for the management of packages which include three important routines ( install,uninstall and update ) in the IPFire addons.

  1. create a fprobe (name same as lfs script) directory in the src/paks path.
  2. copy routines (install,uninstall and update ) from src/paks/default/* path into the src/paks/fprobe.

Re-run build script for the compilation of fprobe addon. Following output shows the successful compilation of fprobe.


New package (fprobe-1.1-2.ipfire) is created for fprobe addon in the packages directory as shown below.


Installation of fprobe on IPFire

Copy newly created fprobe package (fprobe-1.1.2.ipfire) inside /opt/pakfire/tmp path.


Extraction and installation of fprobe package is shown in following snapshot.

tar -xf fprobe-1.1.2.ipfire
installation of ipfire package

Run ./ routine for the installation of compiled package.


Successful installation of fprobe on the IPFire system is shown below.



This tutorial is about the compilation and installation of NetFlow addon "fprobe" on the IPFire system. The purpose of this new addon is to collects network traffic data and forward to the collector for further analysis.

Leave a Comment