CISC-ND-000470 - The Cisco router must be configured to prohibit the use of all unnecessary and nonsecure functions and services.
Network devices are capable of providing a wide variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations. Additionally, it is sometimes convenient to provide multiple services from a single component (e.g., email and web services); however, doing so increases risk over limiting the services provided by any one component. To support the requirements and principles of least functionality, the network device must support the organizational requirements providing only essential capabilities and limiting the use of ports, protocols, and/or services to only those required, authorized, and approved. Some network devices have capabilities enabled by default; if these capabilities are not necessary, they must be disabled. If a particular capability is used, then it must be documented and approved.
Disable the following services if enabled as shown in the example below. R2(config)#no boot network R2(config)#no ip boot server R2(config)#no ip bootp server R2(config)#no ip dns server R2(config)#no ip identd R2(config)#no ip finger R2(config)#no ip http server R2(config)#no ip rcmd rcp-enable R2(config)#no ip rcmd rsh-enable R2(config)#no service config R2(config)#no service finger R2(config)#no service tcp-small-servers R2(config)#no service udp-small-servers R2(config)#no service pad R2(config)#end