Home > Computer Forensics - Networking

The interlinking of the computers to have a network introduces a system administrator to many unknown challenges of applying the security measures in order to protect the system from intrusions by an unauthorized person. The computer networks pose a challenge since the administrator has the task of allowing the access to different people.

The task can be accomplished with the help of many tools like the Network Forensics Analysis Tool. It is the software tool that has a number of features which can be useful for a networking forensics professional. Any such software tool has typically the following working model. The first thing a network forensic tool has to do is to capture the network traffic.

The capturing of the packets is done automatically over a LAN through any compatible port that has the packet monitoring capacity with a high speed switch. The packets are usually stored on the secondary storage media which can be on the computer system or even in the hard disk drive of the tool kit itself. The format in which these file are stored is that of tcpdump file format. The functioning of the tool kit is such that the new data that is captured replaces the earlier data over it. The replacement order is in a FIFO manner that is first in, first out basis.

Next it should analyze the data network traffic. The analysis is done as discussed below. The user should select a time interval and the task of the system is to protect the data in that interval. The protection is so applied so that the data should not be overwritten by any new data. The key is that the packets are reassembled from the time interval into the data streams that are individual.

The data streams are the sequences of related packets. Each of the data stream is then passed via the analysis engine. This analysis engine attempts to recognize the protocols as well as the content. This is done by utilizing the hierarchical set of parsing modules. This process of parsing allows the tool kit to detect the spoofing. It is done by the interpretation of content of the data streams. This tool kit then extracts the search criteria and the user is able to find the specific network transactions. The entire parse results, as well as the analysis conclusions are then stored in a database.

The next step is the discovery of the data. The users are provided with an interactive Graphical User Interface – GUI which is user friendly. The users are also capable of browsing the results database. There is sufficient help provided and also an option for the generation of online queries. It is also possible for the users to give instructions to the tool kit to generate the detailed reports.

The reports that are generated provide useful information that can prove as vital in forensics. The network forensic tool kits are enclosed in a specific hardware which has the capacity to store the media as well has its own memory. It can also be used for the analysis of the email. The parsing engine can perform the actions of recognizing the content inside the encrypted files. For example the files those are stored after the instant messaging can be decrypted by the tool kit.

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