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===Description===
ntop is a network monitoring tool/traffic probe that shows network usage in graphical form. A web browser is used to view traffic information and network status. For more information look [http://www.ntop.org/ here].

===Prerequisites===
To install ntop the Dag repository must be configured on your system. By default the Dag repo is not configured on sme server. If necessary follow this instruction to configure the repo, otherwise skip to the next section

====Configuring Dag repository====
{{Repository|Dag}}

===Installation===
With the Dag repository configured, install as follows:
 yum install ntop --enablerepo=dag

===Starting and Stopping ntop===
Issue the following commands
 chkconfig ntop on
 config set ntop service status enabled TCPPort 3000 access private

Note: In order to limit the use of system resources, you may only wish to run ntop as required for testing and analysing your system rather than running it continuously.

To manually start, stop and restart ntop do either of the following 
 /etc/init.d/ntop start
 /etc/init.d/ntop stop
 /etc/init.d/ntop restart

To configure ntop to start automatically at boot time do the following
 ln -s /etc/rc.d/init.d/e-smith-service /etc/rc7.d/S83ntop 

===Usage===
From the local network (LAN)

ntop provides its own default web server on port 3000:
 http://yourserverIP:3000

From the Internet (WAN) 

To access ntop remotely, setup SSH port forwarding (eg using PuTTY on Windows):
 ssh -l root -L 3000:localhost:3000 <yourserverIP or yourservername>
Then open a web browser at:
 http://localhost:3000 

From a handheld device (PDA)

A PDA (WAP) plugin is available which can access ntop via:
 http://yourserverIP:3000/plugins/PDAPlugin

===Removal===

If you have permanenty enabled ntop do the following
 rm /etc/rc7.d/S83ntop

Stop ntop
 /etc/init.d/ntop stop

Delete services
 chkconfig ntop off
 config delete ntop

Remove packages
 yum remove ntop
Note: confirm that only the following packages are marked for removal before acknowledging

 ntop           i386 3.3.8-2.el4.rf
 libart_lgpl    i386 2.3.16-3
 perl-rrdtool   i386 1.2.30-1.el4.rf
 rrdtool        i386 1.2.30-1.el4.rf 

===Feature Overview===
See [http://www.ntop.org/overview.html/ here]

----
[[Category: Howto]]
[[Category: Administration]]

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