Details
Disable the identification (identd) server.
Rationale:
Identification protocol enables identifying a user’s transmission control protocol (TCP) session. This information disclosure could potentially provide an attacker with information about users.
Impact:
To reduce the risk of unauthorized access, organizations should implement a security policy restricting network protocols and explicitly require disabling all insecure or unnecessary protocols such as the identification protocol (identd).
Solution
Disable the ident server.
hostname(config)#no ip identd
Default Value:
Disabled by default
Supportive Information
The following resource is also helpful.
This security hardening control applies to the following category of controls within NIST 800-53: System and Information Integrity.This control applies to the following type of system Cisco.