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Intranet Security

Posted on 2004-09-27
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How to keep track of request from Intranet to Internet? or is there any software to keep track of work done on all the machines in the intranet ?
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Question by:riteinfotech
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cagri earned 125 total points
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Well, of course there are many software doing what you are looking for but let's clearify first. What are we trying to achieve ?

Where the people on Intranet doing on the Internet ? Or What the Intranet people doing including local activities ??

For the first, you will be likely to be probing between your local area switch and Internet router (or mirroring the Internet port of your switch). The latter, requires you to monitor EVERYTHING which is  in general much more CPU intensive depending the size and load of your network.

Here are a few starter applications:

http://www.ntop.org/ntop.html 
NTOP is a great reporting tool for your traffic, it does not show every single action historically however, provides you a very detailed, broad reporting about your network usage. Like top 10 users, applications used by each of these users, what they are downloading etc.etc.

If you would like to make autiding and would like to KEEP EVERYTHING, flow-tools coupled with Cisco NetFlow technology is a great solution, you can keep a log of your traffic back to several months and perform in depth queries like where was that guy connecting at 14:24, Tuesday, or who was connecting to blah.com at this hour ???
http://www.splintered.net/sw/flow-tools/ is the link for flowtools and it also has the info about Cisco configuration.

Both solutions are FOC considering you have some hardware in hand.

Hope this helps,

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