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CIS CSC: Devices and Ports (CSC 1,9)

by Cesar Navas
June 20, 2016

As new technologies continue to advance, personal devices are increasingly found connected to enterprise networks. New or unknown devices on an organization's network can pose a great risk to the organization. Managing control of all network devices is critical in maintaining a secure environment.

The CIS Critical Security Controls (CSC) identifies Control 1 (CSC 1) as the Inventory of Authorized and Unauthorized Hosts, and Control 9 (CSC 9) as Limitation and Control of Network Ports, Protocols, and Services.

As defined by the Center for Internet Security (CIS), the Critical Security Controls are a relatively small number of prioritized, well-vetted, and supported security actions that organizations can take to assess and improve their current security state. Developed based on specific knowledge of the threat environment and currently available technologies, the Controls are informed by actual attacks and effective defenses and reflect the combined knowledge of many experts.

Analysts can use this dashboard to easily drill down into the data presented by the dashboard components. Detailed information on devices and ports provide a starting point to determine what further steps are the most beneficial. This information can provide more effective and efficient vulnerability management, patching, and remediation within the organization. In turn, further assisting the organization better protect itself from exploitation of network vulnerabilities, potential intrusions, attacks, and data loss.

This dashboard and its components are available in the Tenable.sc Feed, a comprehensive collection of dashboards, reports, Assurance Report Cards, and assets. The dashboard can be easily located in the Tenable.sc Feed under the category Security Industry Trends.

The dashboard requirements are:

  • Tenable.sc 5.3.1
  • Nessus 8.5.1
  • NNM 5.9.1
  • LCE 6.0.0

Tenable's Tenable.sc Continuous View (CV) is the market-defining continuous network monitoring solution. Tenable.sc CV includes active vulnerability detection with Nessus and passive vulnerability detection with the Nessus Network Monitor (NNM), as well as log correlation with the Log Correlation Engine (LCE). Using Tenable.sc CV, an organization will obtain the most comprehensive and integrated view of its network vulnerabilities.

This dashboard includes the following components:

  • CSC – Inventory of Authorized and Unauthorized Devices - This component displays new hosts detected within the last 24 hours, 72 hours, and 7 days.
  • Network Mapping – Top Ten Most Active Ports in Last 7 Days - This table presents the top ten most active ports on the network in the last seven days based on the number of network traffic events generated.
  • NNM Trust Relationships – Traffic Over Possible Bad Ports - This component collects data on internal client trusted client connections. Results are sorted by TCP port and displayed in a series of matrix indicators within the individual component based on the TCP ports of common malware that are known to establish command and control sessions between hosts.
  • Discovery Scan – Host Count Increase Over Last 25 Days - The 'Host Count Increase Over Last 24 Hours' trend graph component highlights the increase in discovered live hosts over the last day.
  • CSF – New MAC Addresses - The New MAC Addresses table detects new MAC addresses from workstations, servers, mobile, and wireless devices that were first observed in the last 72 hours.
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