By Richard Bejtlich
Community protection isn't really easily approximately construction impenetrable partitions — made up our minds attackers will ultimately triumph over conventional defenses. the simplest desktop protection thoughts combine community safety tracking (NSM): the gathering and research of knowledge that will help you observe and reply to intrusions.
In The perform of community defense tracking, Mandiant CSO Richard Bejtlich indicates you the way to exploit NSM so as to add a powerful layer of defense round your networks — no past adventure required. that can assist you keep away from high priced and rigid options, he teaches you the way to install, construct, and run an NSM operation utilizing open resource software program and vendor-neutral tools.
You'll learn the way to:
• verify the place to set up NSM systems, and dimension them for the monitored networks;
• set up stand-alone or dispensed NSM installations;
• Use command line and graphical packet research instruments, and NSM consoles;
• Interpret community facts from server-side and client-side intrusions;
• combine danger intelligence into NSM software program to spot refined adversaries.
There's no foolproof approach to hold attackers from your community. but if they get in, you'll be ready. The perform of community safety tracking will make it easier to construct a safety internet to realize, include, and keep an eye on them. assaults are inevitable, yet wasting delicate information shouldn't be.
Read or Download The Practice of Network Security Monitoring: Understanding Incident Detection and Response PDF
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Extra info for The Practice of Network Security Monitoring: Understanding Incident Detection and Response
Example text
Prevention mechanisms can block some malicious activity, but it’s increasingly difficult for organizations to defend themselves as adversaries adopt more sophisticated tactics. A team can frustrate or resist intrusions, but time and knowledge frequently become the limiting factors. 2. Security pioneer Winn Schwartau published Time-Based Security in 1999. html). Network Security Monitoring Rationale 5 The Impor ta nce of T ime: C a se S t udy One real-world example shows the importance of time when defending against an intruder.
It’s not as detailed as the full content data, but not as abstract as the session data. Think of it this way: If full content data records every aspect of a phone call, and session data tells you only who spoke and for how long, then transaction data is a middle ground that gives you the gist of the conversation. Let’s briefly look at transaction data for a different aspect of the sample web browsing activity: DNS requests and replies, as shown in Listing 1-6. Again, we don’t need all the granularity of the full content data, but the session data would just show that an exchange took place between the two computers.
When CIRTs conduct operations using NSM principles, they benefit from the following capabilities: • • • • CIRTs collect a rich amount of network-derived data, likely exceeding the sorts of data collected by traditional security systems. CIRTs analyze this data to find compromised assets (such as laptops, personal computers, servers, and so on), and then relay that knowledge to asset owners. CIRTs and the owners of the computing equipment collaborate to contain and frustrate the adversary. CIRTs and computer owners use NSM data for damage assessment, assessing the cost and cause of an incident.
