Download Defend I.T.: security by example by Ajay Gupta PDF

By Ajay Gupta

Shield I.T.: defense via instance attracts on exact warfare tales to spot what used to be performed correct and what was once performed incorrect in real computer-security assaults, supplying you with the chance to learn from actual reports. techniques to securing platforms and networks fluctuate generally from to and association to association. by way of interpreting quite a few real-life incidents businesses are too embarrassed to publicly percentage, the authors clarify what might have been performed another way to prevent the losses incurred - no matter if making a diversified method for incident reaction or having larger defense countermeasures in starting point with.

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The fact that REM did not have a standard image complicated this search. However, no unknown users, hidden files, or Trojan horses were found. A check of the scheduler also revealed that nothing unexpected was preconfigured to run automatically. REM did not keep audit logs on its network or at its firewall, and it did not have an IDS, so there was little way of learning whether anyone from the outside may have gained access to its network. 4 Incident Reconstruction As mentioned already, a cyber crime team was brought in to track, capture, and potentially prosecute the hacker.

And nothing else can be used to get the kind of information available in the logs. Not only do you have to record and keep logs, but you have to take actions to ensure that they are secure and accurate, even when the overall network is compromised. We will talk about this more in later chapters. 2 Responding to Changing Usage Patterns Aspen should have discussed the change in usage patterns with REM when it was first observed. Changes in technology and network usage patterns can certainly be due to changes in business practices or even corporate culture.

Traceroute is also a native tool on both Windows (tracert) and UNIX (traceroute). 3, can help identify Internet routers and firewalls. 3. Partial View of the Target Network Part I: Basic Hacking 31 32 Part I: Basic Hacking The intruder must still trace a better profile of the firewall in question and chooses to use the Xmas scan: # nmap -sX -P0 targetIP An Xmas scan (performed with flag -sX) is a scan with all flags set, including the FIN, URG, and PUSH flags. Hide in Plain Sight Keep in mind that many firewalls use an interesting option to hide from VisualRoute and other route-tracing tools.

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