Details

When you want to allow only an outgoing connection on a line, use the no exec command.

Solution

Disable the inbound connections on the auxiliary port.
hostname(config)#line aux 0
hostname(config-line)#transport input none

Supportive Information

The following resource is also helpful.

• https://workbench.cisecurity.org/files/508https://workbench.cisecurity.org/files/508

This security hardening control applies to the following category of controls within NIST 800-53: Configuration Management.This control applies to the following type of system Cisco.

References

• 800-53|CM-7b.

Source

• Tenable.com/audits