File README.SuSE of Package ntop
ntop is a tool that shows the network usage
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If you have ntop listening on port 3000,
the URL to access is http://hostname:3000/
Administrators can protect selected URLs with a password.
All the administration is performed with ntop.
The default administrator user is 'admin'. You will have
to set the password for admin manually with the command
ntop -A -u wwwrun
Please note that a HTTP server is NOT needed in
order to use the program in interactive mode.
By default, you may access ntop only from localhost at
port 3000.