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Introduction

This project is about capturing packets flow through a network interface, save each specific-size chunk into a PCAP file, and then automatically convert it to the feature-extracted CSV file by CICFlowMeter-3.0.

The CSV is meant to be analysed for intrusion detection. You can find further detail at the website of CIC.

Usage

Quick Start

For trying, just run:

try_me.sh

To Run Literally

Calling capture_interface_pcap.sh will capture the packets since the beginning until specific time in the script, periodically. Each time that PCAP file is saved, the script convert_pcap_csv.sh will be called the converter, CICFlowMeter.

capture_interface_pcap.sh <interface> <pcap_output_dir> [priviledged_user_name]

For example:

capture_interface_pcap.sh wlan0 pcap

or

capture_interface_pcap.sh eth0 output_dir bobuser

To Run on Startup

Edit the working directory in file pcap2ciclog.service, and also the executed script shoud be refered with absolute path:

...
[Service]
WorkingDirectory=/home/../../TCPDUMP_and_CICFlowMeter
ExecStart=/home/../../TCPDUMP_and_CICFlowMeter/pcap2ciclog.sh
...

Then, link it into the directory /lib/systemd/system:

cd /lib/systemd/system
sudo ln -sf <the-dir>/pcap2ciclog.service

Enable the service:

sudo systemctl enable pcap2ciclog.service

Finally, let's get started!

sudo systemctl start pcap2ciclog.service

Note on Issues

To Fix the Permission Denied Problem

In some case of using on Ubuntu with Apparmor, you may has a 'permission denied' issue when tcpdump tries to execute a script. It is a security measure. To relax, please add the following line into file /etc/apparmor.d/usr.sbin.tcpdump:

/usr/sbin/tcpdump {
  ...
  # for -z
  /**/* ixr,      # <-- add me!
  ...
}

Then, restart the service:

sudo service apparmor restart

To Fix java.lang.UnsatisfiedLinkError Problem

Due to the libpcap-dev package was not installed. The error will be shown:

Exception in thread "main" java.lang.UnsatisfiedLinkError: com.slytechs.library.NativeLibrary.dlopen(Ljava/lang/String;)J
        at com.slytechs.library.NativeLibrary.dlopen(Native Method)
        at com.slytechs.library.NativeLibrary.<init>(Unknown Source)
        at com.slytechs.library.JNILibrary.<init>(Unknown Source)
        at com.slytechs.library.JNILibrary.loadLibrary(Unknown Source)
        at com.slytechs.library.JNILibrary.register(Unknown Source)
        at com.slytechs.library.JNILibrary.register(Unknown Source)
        at com.slytechs.library.JNILibrary.register(Unknown Source)
        at org.jnetpcap.Pcap.<clinit>(Unknown Source)
        at cic.cs.unb.ca.jnetpcap.PacketReader.config(PacketReader.java:58)
        at cic.cs.unb.ca.jnetpcap.PacketReader.<init>(PacketReader.java:52)
        at cic.cs.unb.ca.ifm.CICFlowMeter.main(CICFlowMeter.java:93)

Please install via:

sudo apt install libpcap-dev

For furture OSs, please follow the guildline on https://javatutorial.net/capture-network-packages-java.

To Build CICFlowMeter Command-line Version

The forked and revised version of ISCX/CICFlowMeter can be found at https://github.com/iPAS/CICFlowMeter. Nevertheless, in case you need to know how to make it by yourself, or if the next version need the maintenance again, the guidance is directed by the following clues.

Get CICFlowMeter

git clone https://github.com/ISCX/CICFlowMeter.git

Then, go inside.

Get Gradle (option)

chmod +x gradlew
./gradlew

However, this is not neccessary in case you already have it.

Update CICFlowMeter

In CICFlowMeter directory, please:

git fetch --all
git reset original/master --hard

All code will be renew as the original repository. All revised files will be gone, even yours.

Build CICFlowMeter

  • Edit the build.gradle file, enable to find JNetPCAP package:

    1. Add a new repository:

      repositories {
    ...

    maven {
        url "http://clojars.org/repo/"
    }

}

    2. Reversion the dependency:

      dependencies {
    ...

    // compile group: 'org.jnetpcap', name: 'jnetpcap', version:'1.4.1'
    compile group: 'jnetpcap', name: 'jnetpcap', version: '1.4.r1425-1g'

  • To make the command-line enable:

    1. Change all occurences of the following:

       cic.cs.unb.ca.ifm.App

      to

       cic.cs.unb.ca.ifm.CICFlowMeter

    2. Exclude the GUI besides include the command-line source file:

      sourceSets {
    main {
        java {
            srcDir 'src'
            // exclude '**/CICFlowMeter.java'
            exclude '**/App.java'
        }
    }
}

    3. Edit the code src/main/java/cic/cs/unb/ca/ifm/CICFlowMeter.java by looking at my CICFlowMeter.java.

  • Then, build the project:

    gradle build

Test Running CICFlowMeter

  • To run via Gradle:

    gradle run

    The result might be shown like the following:

      type Jar
  type JavaExec
  :compileJava UP-TO-DATE
  :processResources UP-TO-DATE
  :classes UP-TO-DATE
  :run
  cic.cs.unb.ca.ifm.CICFlowMeter Sorry,no pcap files can be found under: <...some path...>

  BUILD SUCCESSFUL

  Total time: 0.936 secs

Install

The built package is in directory CICFlowMeter_repo/build/distributions/. Get and place in a directory that fit.

Update the Runner Script

After the distribution package was gotten, unpack and revise the code in script CICFlowMeter-3.0/bin/CICFlowMeter:

  1. Change the reference to libraries with real path:

     DEFAULT_JVM_OPTS='"-Djava.library.path=../lib/native"'

    to

     DEFAULT_JVM_OPTS='"-Djava.library.path='$APP_HOME/lib/native'"'

  2. Call to command-line instead of GUI application:

     eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $CIC_FLOW_METER_OPTS -classpath "\"$CLASSPATH\"" cic.cs.unb.ca.ifm.App "$APP_ARGS"

    to

     eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $CIC_FLOW_METER_OPTS -classpath "\"$CLASSPATH\"" cic.cs.unb.ca.ifm.CICFlowMeter "$APP_ARGS"

To Build CICFlowMeter-4

  • gradle and maven are required