CMMC v2.11 Practices

SC.L2-3.13.9  

Reference: CMMC v2.11

Family: SC

Level Introduced: 2

Title: Connections Termination

Practice:
Terminate network connections associated with communications sessions at the end of the sessions or after a defined period of inactivity.

Further Discussion:
Prevent malicious actors from taking advantage of an open network session or an unattended computer at the end of the connection. Balance user work patterns and needs against security to determine the length of inactivity that will force a termination.

This requirement, SC.L2-3.13.9, specifies network connections be terminated under certain conditions, which complements AC.L2-3.1.18 that specifies control of mobile device connections.

Example
You are an administrator of a server that provides remote access. Your company’s policies state that network connections must be terminated after being idle for 60 minutes [a]. You edit the server configuration file and set the timeout to 60 minutes and restart the remote access software [c]. You test the software and verify that the connection is terminated appropriately.

Potential Assessment Considerations
• Are the network connections requiring management and time-out for inactivity documented [a]?
• Are the network connections requiring management and time-out for inactivity configured and implemented [c]?

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Source: CMMC v2.11