Information
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.
Solution
Disable the ident server.
hostname(config)#no ip identd
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).
Default Value:
Disabled by default
References:
http://www.cisco.com/en/US/docs/solutions/Enterprise/Security/Baseline_Security/sec_chap4.html#wp1056539