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Where should NIDS be placed?
Network intrusion detection system (NIDS) is an independent platform that examines network traffic patterns to identify intrusions for an entire network. It needs to be placed at a choke point where all traffic traverses. A good location for this is in the DMZ.
Where would you put the network sensors?
Sensors can be placed in front of a filtering router or a firewall, or they can be placed behind the filtering router or firewall. For the highest level of protection, multiple sensors can be used: one in front of the router/firewall and another behind the router/firewall.
Where is the most common placement of IDS in a network?
Placement of the IDS device is an important consideration. Most often it is deployed behind the firewall on the edge of your network. This gives the highest visibility but it also excludes traffic that occurs between hosts.
What two sensors does the network based IDPS use?
Network-based IDPS sensors can be deployed in one of two modes: inline or passive. An inline sensor is deployed so that the traffic it monitors passes through it. Some inline sensors are hybrid firewall/IDPS devices.
WHAT DO network sensors do?
A sensor can be anything from a network tap to a firewall log; it is something that collects information about your network and can be used to make judgement calls about your network’s security.
What are sensors in IDS?
A sensor captures network packets through its monitoring interface. Packets are reassembled, if required, and compared against a signature indicating typical intrusion activity. If an attack is detected, the sensor logs the attack and notifies the Director platform through the command and control interface.
What is the difference between firewall and IDS?
The main difference being that firewall performs actions such as blocking and filtering of traffic while an IPS/IDS detects and alert a system administrator or prevent the attack as per configuration. A firewall allows traffic based on a set of rules configured.
What is the downside to an inline sensor?
Or, it could disrupt an attack by reconfiguring the ACL on another network device, such as a firewall or router. They can also throttle bandwidth usage. For example, if an inline sensor notices a DoS attack for a specific protocol, such as ICMP, the sensor can limit the percentage of ICMP.
What are the advantages of NIDS?
Benefits • NIDS identify and prevent security threats from compromising secure networks. The deployment of NIDS has little impact on network performance. NIDS are usually passive devices that listen on a network without interfering with the normal operation of a network.