nfstream 5.1.1

A Flexible Network Data Analysis Framework

nfstream: a flexible network data analysis framework

nfstream is a Python package providing fast, flexible, and expressive data structures designed to make working with online or offline network data both easy and intuitive. It aims to be the fundamental high-level building block for doing practical, real world network data analysis in Python. Additionally, it has the broader goal of becoming a common network data processing framework for researchers providing data reproducibility across experiments.

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Main Features

• Performance: nfstream is designed to be fast (x10 faster with PyPy support) with a small CPU and memory footprint.
• Layer-7 visibility: nfstream deep packet inspection engine is based on nDPI. It allows nfstream to perform reliable encrypted applications identification and metadata extraction (e.g. TLS, QUIC, TOR, HTTP, SSH, DNS, etc.).
• Flexibility: add a flow feature in 2 lines as an NFPlugin.
• Machine Learning oriented: add your trained model as an NFPlugin.

How to use it?

• Dealing with a big pcap file and just want to aggregate it as network flows? nfstream make this path easier in few lines:

from nfstream import NFStreamer
my_awesome_streamer = NFStreamer(source="facebook.pcap", # or network interface (source="eth0")
                                 snaplen=65535,
                                 idle_timeout=30,
                                 active_timeout=300,
                                 plugins=(),
                                 dissect=True,
                                 max_tcp_dissections=10,
                                 max_udp_dissections=16,
                                 statistics=False,
                                 account_ip_padding_size=False,
                                 enable_guess=True,
                                 decode_tunnels=True,
                                 bpf_filter=None,
                                 promisc=True
)

for flow in my_awesome_streamer:
    print(flow)  # print it.
    print(flow.to_namedtuple()) # convert it to a namedtuple.
    print(flow.to_json()) # convert it to json.
    print(flow.keys()) # get flow keys.
    print(flow.values()) # get flow values.

NFEntry(id=0,
        bidirectional_first_seen_ms=1472393122365,
        bidirectional_last_seen_ms=1472393123665,
        src2dst_first_seen_ms=1472393122365,
        src2dst_last_seen_ms=1472393123408,
        dst2src_first_seen_ms=1472393122668,
        dst2src_last_seen_ms=1472393123665,
        src_ip='192.168.43.18',
        dst_ip='66.220.156.68',
        version=4,
        src_port=52066,
        dst_port=443,
        protocol=6,
        vlan_id=4,
        bidirectional_packets=19,
        bidirectional_raw_bytes=5745,
        bidirectional_ip_bytes=5479,
        bidirectional_duration_ms=1300,
        src2dst_packets=9,
        src2dst_raw_bytes=1345,
        src2dst_ip_bytes=1219,
        src2dst_duration_ms=1300,
        dst2src_packets=10,
        dst2src_raw_bytes=4400,
        dst2src_ip_bytes=4260,
        dst2src_duration_ms=997,
        expiration_id=0,
        master_protocol=91,
        app_protocol=119,
        application_name='TLS.Facebook',
        category_name='SocialNetwork',
        client_info='facebook.com',
        server_info='*.facebook.com,*.facebook.net,*.fb.com,\
                     *.fbcdn.net,*.fbsbx.com,*.m.facebook.com,\
                     *.messenger.com,*.xx.fbcdn.net,*.xy.fbcdn.net,\
                     *.xz.fbcdn.net,facebook.com,fb.com,messenger.com',
        j3a_client='bfcc1a3891601edb4f137ab7ab25b840',
        j3a_server='2d1eb5817ece335c24904f516ad5da12')

• nfstream also extracts 60+ flow statistical features

from nfstream import NFStreamer
my_awesome_streamer = NFStreamer(source="facebook.pcap", statistics=True)
for flow in my_awesome_streamer:
    print(flow)

NFEntry(id=0,      
        bidirectional_first_seen_ms=1472393122365,
        bidirectional_last_seen_ms=1472393123665,
        src2dst_first_seen_ms=1472393122365,
        src2dst_last_seen_ms=1472393123408,
        dst2src_first_seen_ms=1472393122668,
        dst2src_last_seen_ms=1472393123665,
        src_ip='192.168.43.18',
        dst_ip='66.220.156.68',
        version=4,
        src_port=52066,
        dst_port=443,
        protocol=6,
        vlan_id=4,
        bidirectional_packets=19,
        bidirectional_raw_bytes=5745,
        bidirectional_ip_bytes=5479,
        bidirectional_duration_ms=1300,
        src2dst_packets=9,
        src2dst_raw_bytes=1345,
        src2dst_ip_bytes=1219,
        src2dst_duration_ms=1300,
        dst2src_packets=10,
        dst2src_raw_bytes=4400,
        dst2src_ip_bytes=4260,
        dst2src_duration_ms=997,
        expiration_id=0,
        bidirectional_min_raw_ps=66,
        bidirectional_mean_raw_ps=302.36842105263156,
        bidirectional_stdev_raw_ps=425.53315715259754,
        bidirectional_max_raw_ps=1454,
        src2dst_min_raw_ps=66,
        src2dst_mean_raw_ps=149.44444444444446,
        src2dst_stdev_raw_ps=132.20354676701294,
        src2dst_max_raw_ps=449,
        dst2src_min_raw_ps=66,
        dst2src_mean_raw_ps=440.0,
        dst2src_stdev_raw_ps=549.7164925870628,
        dst2src_max_raw_ps=1454,
        bidirectional_min_ip_ps=52,
        bidirectional_mean_ip_ps=288.36842105263156,
        bidirectional_stdev_ip_ps=425.53315715259754,
        bidirectional_max_ip_ps=1440,
        src2dst_min_ip_ps=52,
        src2dst_mean_ip_ps=135.44444444444446,
        src2dst_stdev_ip_ps=132.20354676701294,
        src2dst_max_ip_ps=435,
        dst2src_min_ip_ps=52,
        dst2src_mean_ip_ps=426.0,
        dst2src_stdev_ip_ps=549.7164925870628,
        dst2src_max_ip_ps=1440,
        bidirectional_min_piat_ms=0,
        bidirectional_mean_piat_ms=72.22222222222223,
        bidirectional_stdev_piat_ms=137.34994188549086,
        bidirectional_max_piat_ms=398,
        src2dst_min_piat_ms=0,
        src2dst_mean_piat_ms=130.375,
        src2dst_stdev_piat_ms=179.72036811192467,
        src2dst_max_piat_ms=415,
        dst2src_min_piat_ms=0,
        dst2src_mean_piat_ms=110.77777777777777,
        dst2src_stdev_piat_ms=169.51458475436397,
        dst2src_max_piat_ms=1,
        bidirectional_syn_packets=2,
        bidirectional_cwr_packets=0,
        bidirectional_ece_packets=0,
        bidirectional_urg_packets=0,
        bidirectional_ack_packets=18,
        bidirectional_psh_packets=9,
        bidirectional_rst_packets=0,
        bidirectional_fin_packets=0,
        src2dst_syn_packets=1,
        src2dst_cwr_packets=0,
        src2dst_ece_packets=0,
        src2dst_urg_packets=0,
        src2dst_ack_packets=8,
        src2dst_psh_packets=4,
        src2dst_rst_packets=0,
        src2dst_fin_packets=0,
        dst2src_syn_packets=1,
        dst2src_cwr_packets=0,
        dst2src_ece_packets=0,
        dst2src_urg_packets=0,
        dst2src_ack_packets=10,
        dst2src_psh_packets=5,
        dst2src_rst_packets=0,
        dst2src_fin_packets=0,
        master_protocol=91,
        app_protocol=119,
        application_name='TLS.Facebook',
        category_name='SocialNetwork',
        client_info='facebook.com',
        server_info='*.facebook.com,*.facebook.net,*.fb.com,\
                     *.fbcdn.net,*.fbsbx.com,*.m.facebook.com,\
                     *.messenger.com,*.xx.fbcdn.net,*.xy.fbcdn.net,\
                     *.xz.fbcdn.net,facebook.com,fb.com,messenger.com',
        j3a_client='bfcc1a3891601edb4f137ab7ab25b840',
        j3a_server='2d1eb5817ece335c24904f516ad5da12')

• From pcap to Pandas DataFrame?

flows_count = NFStreamer(source='devil.pcap').to_pandas()
my_dataframe.head(5)

• From pcap to csv file?

flows_rows_count = NFStreamer(source='devil.pcap').to_csv(path="devil.pcap.csv", sep=";")

• Didn't find a specific flow feature? add a plugin to nfstream in few lines:

from nfstream import NFPlugin

class packet_with_666_size(NFPlugin):
    def on_init(self, pkt): # flow creation with the first packet
        if pkt.raw_size == 666:
            return 1
        else:
            return 0

    def on_update(self, pkt, flow): # flow update with each packet belonging to the flow
        if pkt.raw_size == 666:
            flow.packet_with_666_size += 1

streamer_awesome = NFStreamer(source='devil.pcap', plugins=[packet_with_666_size()])
for flow in streamer_awesome:
    print(flow.packet_with_666_size) # see your dynamically created metric in generated flows

Run your Machine Learning models

In the following, we want to run an early classification of flows based on a trained machine learning model than takes as features the 3 first packets size of a flow.

Computing required features

from nfstream import NFPlugin

class feat_1(NFPlugin):
    def on_init(self, obs):
        entry.feat_1 == obs.raw_size

class feat_2(NFPlugin):
    def on_update(self, obs, entry):
        if entry.bidirectional_packets == 2:
            entry.feat_2 == obs.raw_size

class feat_3(NFPlugin):
    def on_update(self, obs, entry):
        if entry.bidirectional_packets == 3:
            entry.feat_3 == obs.raw_size

Trained model prediction

class model_prediction(NFPlugin):
    def on_update(self, obs, entry):
        if entry.bidirectional_packets == 3:
            entry.model_prediction = self.user_data.predict_proba([entry.feat_1,
                                                                   entry.feat_2,
                                                                   entry.feat_3])
            # optionally we can force NFStreamer to immediately expires the flow
            # entry.expiration_id = -1

Start your ML powered streamer

my_model = function_to_load_your_model() # or whatever
ml_streamer = NFStreamer(source='devil.pcap',
                         plugins=[feat_1(volatile=True),
                                  feat_2(volatile=True),
                                  feat_3(volatile=True),
                                  model_prediction(user_data=my_model)
                                  ])
for flow in ml_streamer:
     print(flow.model_prediction) # now you will see your trained model prediction.

• More example and details are provided on the official documentation.
• You can test nfstream without installation using our live demo notebook.

Installation

Using pip

Binary installers for the latest released version are available:

python3 -m pip install nfstream

Build from sources

If you want to build nfstream from sources on your local machine:

Linux

sudo apt-get install autoconf automake libtool pkg-config libpcap-dev
sudo apt-get install libusb-1.0-0-dev libdbus-glib-1-dev libbluetooth-dev libnl-genl-3-dev flex bison
git clone https://github.com/aouinizied/nfstream.git
cd nfstream
python3 -m pip install -r requirements.txt
python3 setup.py bdist_wheel

MacOS

brew install autoconf automake libtool pkg-config
git clone https://github.com/aouinizied/nfstream.git
cd nfstream
python3 -m pip install -r requirements.txt
python3 setup.py bdist_wheel

Contributing

Please read Contributing for details on our code of conduct, and the process for submitting pull requests to us.

Authors

Zied Aouini created nfstream and these fine people have contributed.

Ethics

nfstream is intended for network data research and forensics. Researchers and network data scientists can use these framework to build reliable datasets, train and evaluate network applied machine learning models. As with any packet monitoring tool, nfstream could potentially be misused. Do not run it on any network of which you are not the owner or the administrator.

License

This project is licensed under the GPLv3 License - see the License file for details