Cisco IOS XE Release 3 NDM STIG Version Comparison

There are 58 differences between versions v1 r3 (Oct. 27, 2017) (the "left" version) and v1 r5 (Jan. 25, 2019) (the "right" version).

Check CISR-ND-000001 was changed between these two versions. Green, underlined text was added, red, struck-out text was removed.

The regular view of the left check and right check may be easier to read.

Title

The Cisco IOS XE ISR 4000 Series router must limit the number of concurrent SSH sessions to an organization-defined number.

Check Content

Review the Cisco IOS XE ISR 4000 Series router configuration to see if the device limits the number of concurrent SSH sessions to an organization-defined number. The number. The following commands should be in the configuration: line vty 0 1 exec-timeout 60 0 session-limit 2 login authentication TEST transport input ssh transport output ssh line vty 2 4 exec-timeout 60 0 session-limit 2 login authentication TEST transport input none transport output none If the number of concurrent sessions are not limited, this is a finding.

Discussion

Device management includes the ability to control the number of administrators and management sessions that manage a device. Limiting the number of allowed administrators and sessions per administrator is helpful in limiting risks related to DoS attacks. This requirement addresses concurrent sessions for administrative accounts and does not address concurrent sessions by a single administrator via multiple administrative accounts. The maximum number of concurrent sessions should be defined based upon mission needs and the operational environment for each system.

Fix

Configure the Cisco IOS XE ISR 4000 Series router to limit the number of concurrent SSH sessions to an organization-defined number. The number. The configuration will look similar to the example below: line vty 0 1 exec-timeout 60 0 session-limit 2 login authentication TEST transport input ssh transport output ssh line vty 2 4 exec-timeout 60 0 session-limit 2 login authentication TEST transport input none transport output none