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Network Security Focus-IDS
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Help for placing IDS sensors

from [star . gemini] Network Security [Permanent Link]
Subject: Help for placing IDS sensors
Date: 21 Apr 2007 05:23:37 -0000 
Hi,

We are in the process of implementing a project involving a huge network 
comprising of thousands computers and users (1 computer :1.5 users). The 
network is spread across 600 locations. We wish to implement ADS on Win2003 
servers. 

In a switched environment, as we all know NIDSs have problems. There are around 
40 links directly to HO. Each location has its own LAN. Each location has 
sublocations with LANs who authenticate to those higher in hierarchy. 

 

How do we implement IDS sensors 20 (gigabit + 10/100) in count, so that we can 
monitor all the traffic at lowest possible level of network, with minimal 
number of sensors. How can we introduce sensors so that they function as 
perfect as Inline

 

 

To give you and idea?  

 

                                                                  ISP1     ISP2
                                                                     \   /      
  
                                                                HO(Core ROUTER) 
+  DC 
                                                                     /  \
                                                                   DC   DC

                                                                  /       \     

     Router + LAN(A).      Router +LAN B----40
              /            \ 

  Router + LAN(A1)    Router + LanB1
          /                  \
                                                Router + LAN(AA1)    Router + 
LAN
      /                        \     

   Subloc2                    Subloc3 |       
   /                             \
Users                             Users, computers............ 

 

 

Digvijay

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