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Security Network Intrusion detection system (IDS) - Essay Example

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Security Network Intrusion detection system (IDS)

1) The first and foremost thing is to have a grip upon the mental approach. I would try to stay composed and relaxed rather than getting panicked. I would analyze the whole situation cool mind. Whenever a network is established, problems like these are likely to occur and companies always have a well organized solution for this. So, there is no need to get horrified.
2) Under such a situation, it becomes important to isolate the affected computer immediately. An affected machine on a network can cause all other machines on that network to be affected. I would unplug the cable and then disconnect the affected computer both from the internet and the network. This way, the intruder will not be able to have an access to the machine nor will he be able to attack other computers on the network by means of the affected one.
3) I would block the port 3389 temporarily. TCP port 3389 is the Remote Desktop Protocol (RDP) that enables a user to connect to a computer on a network. I will find out if VPN (virtual private network) had been established to protect the RDP or port 3389 traffic. I would make arrangements for the establishment of site-to-site VPN tunnel before reconnecting the computer to the network so as to secure the RDP traffic from Address Resolution Protocol (ARP) poisoning (Savill, 2008). Further investigations include: Were there passwords and sensitive information saved on the computer like ISP access passwords? These must be changed at once. How long has the intrusion gone undetected? The chances of co-computers on the network being affected increase with the time the affected one keeps on working on the network. I would investigate if the computer had updated anti-virus and desktop firewall software installed. I would make backups of all sensitive information and format the operating system. Then, I will reload the sensitive information from backup files while scanning them ...Show more


A network intrusion detection system (NIDS) keeps a check on the network traffic, signals when it encounters a security breach, a malicious activity or an attack, and obstructs the source IP…
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