Ways Of Implementing Intrusion Detection System
In my previous article, I have looked at some of the ways of implementing firewalls in network security. In this article, I want to look at some of the ways of implementing Intrusion Detection System in network security. Follow me as we are going to look at that together in network security.
Many vendor supply IDS, Each of these systems have there own strengths and weaknesses. Deciding which system is best for a particular environment depends on many factors, including the network environment, security level required, budget constraints, and skill required of the person who will be working with the IDS.
#1 Snort
Snort is the most well known open-source IDS available. It is a software implementation installed on the server to monitor incoming traffic. It typically works with a host-based firewall in a system which both the firewall and Snort software run on the same machine. Snort is available for Unix, Linux, Free BSD, and Windows. The software is free to download and documentation is available on the website https://snort.org
Snort works in one of the three modes: sniffer, packet logger and network intrusion-detection.
#2 Sniffer
In packet sniffer mode, The console displays a continuous stream of the content of all packets coming across that machine. This can be a very useful tool for a network administrator. Finding out what traffic is traversing within a network can be the most efficient way to determine where the potential problem lies. It is also a good way to check whether transmissions are encrypted.
#3 Packet logger
Packet logger mode is similar to sniffer mode. The difference is that the packet contents are written to a text file log rather than displayed in the console. This can be more useful for administrators who are scanning a large number of packets for specific items. Once the data is in a text file, users can scan for specific information using a word processor’s search capability.
#4 Network Intrusion Detection
In network intrusion detection mode, Snort uses a heuristic approach to detecting anomalistic traffic. This means it is rule-based and learns from experience. A set of rule initially governs the entire process. Over time, snort combines what it finds with the settings to optimize performance.
It then logs the traffic and can alert the network administrator. This mode requires the most configuration because the user can determine the rule that he/she wishes to implement for the scanning of packets. Snort work primarily from the command line either in Linux or Windows.
Configuring Snort is only a matter of knowing the correct commands to enter and understand their outputs. Anyone with even moderate experience with either Linux shell commands or DOS commands can quickly master the Snort configuration commands. Snort is a good tool when used in conjunction with a host-based firewall or as an IDS on each server to provide additional security.
#5 Cisco Intrusion Detection and Prevention
The Cisco brand is widely recognised and well respected in the network profession, along with its firewall and routers. Cisco has several models of intrusion detection, each with a different culture and purpose.
In the past, Cisco has two specific, widely used IDS products, the Cisco IDS 4200 Series Censors and Cisco Catalyst 6500 Series Intrusion Detection System (IDSM-2) Services Module.
There are a number of products in this group, notably the Firepower 4100 series, the Firepower 8100 series and the Firepower 9000 series. All the product include malware protection as well as sandboxing. These products also integrate cyber threat intelligence feature.
The 4100 series is targeted for small networks and the 9000 series is designed for large scale networks. One of the main benefits of using Cisco security products is their widespread use across the industry and the availability of good training.
The fact that so many organisations use Cisco indicates a high level of successful field testing, which generally indicates a reliable product. Cisco also sponsors a range of certifications on its products, making it easier to determine whether someone is qualified on a particular Cisco product.
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