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Detection Network
Intrusion detection
Your network should have some
network intrusion detection system. With that said, the method
of detecting intrusions, how to monitor, and how to interpret
the data is a complex subject.
Intrusion
Detection Types
- Network - Used to
protect the network or a large part of it. It
listens to all available network packets and tries
to find any intrusion pattern based on the
information in the packets. Where this type of IDS
is placed on the network is important since it
cannot analyze all packets behind routers,
bridges, or switches.
- System - Used to
protect a specific host such as a webserver. This
kind of intrusion system can be especially
effective when a server is in an area off the
firewall such that it is neither on the internet
or on the internal network { Known as a
Demilitarized zone (DMZ) }. These kinds of
intrusion detection systems can usually only
protect one service well.
Intrusion
Detection Systems
Intrusion detection
systems typically consist of two parts which are an engine
and a control console. These two parts are
usually on separate computers. Obviously the console
is used to control and make changes to the behavior of
the intrusion detection engine. The engine analyzes
the network traffic and takes appropriate action if an
intrusion is detected.
Since network
intrusion detection systems must process a lot of
network data in a short time, these systems require a
good deal of processing power. They also require much
RAM for high performance, and may require much hard
drive space to store log information.
Intrusion
Detection Features
- Attack patterns
are saved in a database.
- Data packet
reassembly - Some may or may not re-assemble IP
packets the same way a receiving system would
reassemble them. Most IDS do not reassemble the
packets in this manner. Without reassembling the
packets as the receiver, some attacks may go
unnoticed.
- Checksum
verification - A good IDS will verify packet
checksums to be sure the packet has not been
tampered with.
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Related Topics on Computer and
Information security
- Software
Vulnerability Control
- Firewall Protection
- Network
Intrusion Detection
- Network Port
Scanning
- Network Tools
passwords
- Types of attacks
- Application
Level Protection
- Systems Protection
- Mail and Security
- Hostile Software
For more topics and tutorials visit -
http://www.comptechdoc.org
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