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The Future Of IPS
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User Rank: Moderator
9/23/2013 | 8:28:00 PM
re: The Future Of IPS
At the end of the day, if a system has enough context to know about and prevent real intrusions at the network layer...then we're either talking about the small window between identification and remediation, or something is absolutely wrong at the host layer. IPS can serve as a virtual patch for those vulnerability windows, but beyond that one has to wonder....why aren't we fixing the vulnerabilities rather then spending more time and money on tuning IPS?
Drew Conry-Murray
Drew Conry-Murray,
User Rank: Ninja
9/6/2013 | 2:01:37 AM
re: The Future Of IPS
As usual, it seems like the best defense is well-trained and motivated security staff. Yes, they need products and tools, but tools are just the start, not the end. Many organizations just want to throw a magic box at the problem so they don't have to think about it any more.
User Rank: Apprentice
9/5/2013 | 2:00:56 PM
re: The Future Of IPS
I design security solutions. There are three problems with IPS:
1. You can't monitor everything. The technology to power monitoring everything is not cost effective. Most companies will choose to pass the packets that the IPS cannot process in lieu of dropping them. So a highly skilled person has to "tune" the IPS. This leads to problem 2.
2. IPS takes an investment in professional time to tune. Most companies that purchase an IPS don't understand the investment it takes to do this. An improperly tuned IPS will either allow malicious packets or drop valid packets. At this point the IPS is either neutered or disabled.
3. An IPS cannot inspect encrypted data unless it can decrypt it. If it is decrypting the data and inspecting it, it is putting a greater load on the device (see problem 1).

An IPS deployment is important for a defense in-depth strategy. A properly tuned IPS will make it harder for someone to penetrate an environment. For example, with an IPS, an attacker might have to flood the IPS with data in order to get malicious packets through. While this technique might work, the security staff should be more vigilant that a compromise took place.
Jeff Jones

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