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how do i find if there is more than one smtp gateway in my network???

Posted on 2005-02-25
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Last Modified: 2010-03-18
first let me explain how my network is design

internet->router->checkpoint->imss->bobby->checkpoint->exchange->user

this is the way how email get to our users. emails should pass thru IMSS to be checked to see if is spam or got any virus, so all the emails the users receives the headears will attach something from IMSS. but i got some users reporting junk emails, so we check the email headears and notice that emails dont pass thru IMSS. so we try to test if is possible to connect from outside directly to bobby and we didnt found way to get in to it. so another possibility is someone from inside the network create a smtp gateway. so i need to find a way to search for it, or if anyone got any ideias.
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Question by:matutolas
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Fatal_Exception earned 500 total points
ID: 13402880
You can try Languard's security scanner.  It will scan your entire network and show you the services running on your devices..

Free and easy to use (the eval version):

http://www.gfi.com/lannetscan/
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by:matutolas
ID: 13408665
yes i did, but the i got 1000 pcs so will take time to scan it, and the problem is i dont think the pc that is runing the gateway is always on.
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by:Fatal_Exception
ID: 13410250
I would start at your servers then, and make sure that only the proper services are setup there.  You may even have to setup packet sniffers to track this down, using filters so you don't get all the traffic on the wire..  You can analyze the packets (Sending Device) to discover exactly what route they are taking over your network and work backwards from there.  Could be a long process..

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by:Fatal_Exception
ID: 13419199
Thanks, and good luck in your hunt!

FE
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