Network monitor tool

To: Kernelnewbies <kernelnewbies@xxxxxxxxxxxx>
Subject: Network monitor tool
From: "Shyam Burkule" <shyam.burkule@xxxxxxxxx>
Date: Wed, 3 Dec 2008 13:04:48 +0530
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Hi All,

I need information on open source network monitor tool that can monitor windows and Linux systems.

Thanks
--
Shyam