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122 lines
5.1 KiB
Markdown
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How to set up web-based network traffic monitoring system on Linux
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When you are tasked with monitoring network traffic on the local network, you can consider many different options to do it, depending on the scale/traffic of the local network, monitoring platforms/interface, types of backend database, etc.
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[ntopng][1] is an open-source (GPLv3) network traffic analyzer which provides a web interface for real-time network traffic monitoring. It runs on multiple platforms including Linux and MacOS X. ntopng comes with a simple RMON-like agent with built-in web server capability, and uses [Redis][2]-backed key-value server to store time series statistics. You can install ntopng network traffic analyzer on any designated monitoring server connected to your network, and use a web browser to access real-time traffic reports available on the server.
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In this tutorial, I will describe **how to set up a web-based network traffic monitoring system on Linux by using ntopng.**
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### Features of ntopng ###
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- Flow-level, protocol-level real-time analysis of local network traffic.
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- Domain, AS (Autonomous System), VLAN level statistics.
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- Geolocation of IP addresses.
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- Deep packet inspection (DPI) based service discovery (e.g., Google, Facebook).
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- Historical traffic analysis (e.g., hourly, daily, weekly, monthly, yearly).
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- Support for sFlow, NetFlow (v5/v9) and IPFIX through nProbe.
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- Network traffic matrix (who’s talking to who?).
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- IPv6 support.
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### Install ntopng on Linux ###
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The official website offers binary packages for [Ubuntu][3] and [CentOS][4]. So if you use either platform, you can install these packages.
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If you want to build the latest ntopng from [its source][5], follow the instructions below.
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To build ntopng on Debian, Ubuntu or Linux Mint:
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$ sudo apt-get install libpcap-dev libglib2.0-dev libgeoip-dev redis-server wget
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$ tar xzf ntopng-1.0.tar.gz
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$ cd ntopng-1.0/
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$ ./configure
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$ make geoip
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$ make
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In the above steps, “make geoip” will automatically download a free version of GeoIP databases with wget from maxmind.com. So make sure that your system is connected to the network.
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To build ntopng on Fedora:
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$ sudo yum install libpcap-devel glib2-devel GeoIP-devel
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libxml2-devel redis wget
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$ tar xzf ntopng-1.0.tar.gz
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$ cd ntopng-1.0/
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$ ./configure
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$ make geoip
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$ make
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To install ntopng on CentOS or RHEL, first [set up EPEL repository][6], and then follow the same instructions as in [Fedora][7] above.
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### Configure ntopng on Linux ###
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After building ntopng, create a configuration directory for ntopng, and prepare default configuration files as follows. I assume that “192.168.1.0/24″ is the CIDR address prefix of your local network.
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$ sudo mkir /etc/ntopng -p
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$ sudo -e /etc/ntopng/ntopng.start
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> --local-networks "192.168.1.0/24"
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>
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> --interface 1
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$ sudo -e /etc/ntopng/ntopng.conf
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> -G=/var/run/ntopng.pid
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Before running ntopng, make sure to first start redis, which is a key-value store for ntopng.
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To start ntopng on Debian, Ubuntu or Linux Mint:
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$ sudo /etc/init.d/redis-server restart
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$ sudo ./ntopng
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To start ntopng on Fedora, CentOS or RHEL:
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$ sudo service redis restart
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$ sudo ./ntopng
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By default, ntopng listens on TCP/3000 port. Verify this is the case using the command below.
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$ sudo netstat -nap|grep ntopng
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> tcp 0 0 0.0.0.0:3000 0.0.0.0:* LISTEN 29566/ntopng
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### Monitor Network Traffic in Web-Based Interface ###
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Once ntopng is successfully running, go to http://<ip-address-of-host>:3000 on your web browser to access the web interface of ntopng.
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You will see the login screen of ntopng. Use the default username and password: “admin/admin” to log in.
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Here are a few screenshots of ntopng in action.
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Real-time visualization of top flows.
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[][8]
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Live statistics of top hosts, top protocols and top AS numbers.
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[][9]
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Real time report of active flows with DPI-based automatic application/service discovery.
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Historic traffic analysis.
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[][10]
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--------------------------------------------------------------------------------
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via: http://xmodulo.com/2013/10/set-web-based-network-traffic-monitoring-linux.html
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译者：[译者ID](https://github.com/译者ID) 校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](http://linux.cn/) 荣誉推出
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[1]:http://www.ntop.org/products/ntop/
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[2]:http://redis.io/
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[3]:http://apt.ntop.org/
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[4]:http://rpm.ntop.org/
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[5]:http://sourceforge.net/projects/ntop/files/ntopng/
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[6]:http://xmodulo.com/2013/03/how-to-set-up-epel-repository-on-centos.html
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[7]:http://xmodulo.com/go/fedora_guide
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[8]:http://www.flickr.com/photos/xmodulo/10487165303/
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[9]:http://www.flickr.com/photos/xmodulo/10486988416/
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[10]:http://www.flickr.com/photos/xmodulo/10486995114/
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