Beginner’s guide: OSSIM Part 2

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Hope all of you are keeping well. Thank you all for the overwhelming support you people are giving me. So today we’ll deal with everything from basic OSSIM configuration to integrating different types of assets. Before we jump in to all of that I hope all of you are ready with installation. If not please visit my previous post, which is actually the first part. Beginner’s guide: OSSIM (Open Source Security Information Management) part 1 Make sure you have an active internet connection for your OSSIM. As you all know the Alienvault platform has five modules in it, which are the Asset discovery, vulnerability assessment, threat detection, behavioural monitoring and security intelligence. In simple words we add assets first, and then we’ll configure all those assets under each and every module of Alienvault respectively. If you're ready with everything mentioned in part 1, we can now move forward with the configurations. Here we’re just considering only OSSIM not USM.
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Common networking devices and concepts

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Hub

Hub is a network hardware device for connecting multiple Ethernet devices together and making them act as a single network segment and handles a data type known as frames. It has multiple input/output (I/O) ports, in which a signal introduced at the input of any port appears at the output of every port except the original incoming. When a frame is received, it is amplified and then transmitted on to the port of the destination PC.A frame is passed along or "broadcast" to every one of its ports. A hub works at the physical layer (layer 1) of the OSI model.
 

Switch

A network switch is a multiport network bridge that uses hardware addresses to process and forward data at the data link layer (layer 2) of the OSI model. This computer networking device connects devices together on a computer network, by using packet switching to receive, process and forward data to the destination device. A switch serves as a controller, enabling networked devices to talk to each other efficiently. Unlike less advanced network hubs, a network switch forwards data only to one or multiple devices that need to receive it, rather than broadcasting the same data out of each of its ports. Switches are again classified in to two managed and unmanaged.

An unmanaged switch works right out of the box, usually found unmanaged switches in home networking equipment. It is not designed to be configured, hence can’t configure or manage its workings. It have less network capacity than managed switches. So you don't have to worry about installing or setting it up correctly.
Managed Switches

A managed network switch is custom configurable, which offers greater flexibility and capacity than a conventional unmanaged switch. You can monitor and adjust a managed switch locally or remotely.

Routers

A router is a networking device that forwards data packets along networks. Routers perform the "traffic directing" functions on the Internet. A router is connected to at least two networks, commonly two LANs or WANs or a LAN and its ISP's network. Routers are located at gateways, the places where two or more networks connect. When a data packet comes in on one of the lines, the router reads the address information in the packet to determine its ultimate destination.

Firewall

A firewall is a network security device that grants or rejects network access to traffic flows between an untrusted zone (e.g., the Internet) and a trusted zone (e.g., a private or corporate network).It is a network security system that monitors and controls the incoming and outgoing network traffic based on predetermined security rules. It is the primary defense system is corporate networks. We also install firewall in our personal computer to prevent unauthorized access 

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