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HIDS vs NIDS

Posted on 2009-07-14
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Last Modified: 2013-11-29
Hi All,

Our internal network is protected by 2 layers of firewall and we also use TippingPoint and Snort.  Is there any reason why we would need to implement a host-based intrusion detection system on the individual servers?  Any resources supporting this would be appreciated.

Thanks.
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Question by:ISS_Expert
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KETTANEH earned 100 total points
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HIDS will help alot for internal attack ... these attacks will not go through your firewall :)
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by:Phateon
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by:Rich Rumble
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Well if your HIDS doesn't take any action, it's just another IDS making noise. Some HIDS take action, others only alert, most NIDS's are alert only and take no active actions, but an IPS or Application Firewall typically attempt to close, block or reset connections that trigger alerts.
-rich
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by:eaanders
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HIDS have a completely different signature set and of course vary from vendor to vendor.  They report changes to the file system, processes that misbehave, attempts to access or modify protected resources, changes to auditing policy, etc that match signatures.  None of this activity is visible to a NIDS.  If an exposure occurs over an encrypted session (e.g. SSL), your NIDS will not see it but depending on what the exposure attempts to do on the box, your HIDS may detect it.

In addition, some government organizations require HIDS to be installed.  Check your network security compliance requirements
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by:astralcomputing
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HIDS will help you in the event of an HTTPS, endpoint to endpoint encrypted attack. That type of attack will generally go through IPS's because of the private key encryption.
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Expert Comment

by:rsivanandan
ID: 25275019
All the above answers added, is your answer :-)

So it is a go, if you have an option.

Cheers,
rsivanandan
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