From Cisco IOS XE Release 3 RTR Security Technical Implementation Guide
Part of SRG-NET-000131-RTR-000035
Associated with: CCI-000381
A compromised router introduces risk to the entire network infrastructure as well as data resources that are accessible via the network. The perimeter defense has no oversight or control of attacks by malicious users within the network. Preventing network breaches from within is dependent on implementing a comprehensive defense-in-depth strategy including securing each device connected to the network. This is accomplished by following and implementing all security guidance applicable for each node type. A fundamental step in securing each router is to enable only the capabilities required for operation.
Verify that the Cisco ISR 4000 Series router does not have any unnecessary or non-secure ports, protocols and services enabled. For example, the following commands should not be in the configuration: ip bootp server ip identd ip finger ip http-server ip rcmd rcp-enable ip rcmd rsh-enable service config service finger service tcp-small-servers service udp-small-servers service pad If any unnecessary or non-secure ports, protocols or services are enabled, this is a finding.
Disable all unnecessary or non-secure ports, protocols and services. If any of the following commands are in the configuration, remove them. service udp-small-servers service tcp-small-servers service finger service pad ip dns server ip identd ip finger ip http-server ip rcmd rcp-enable ip rcmd rsh-enable ip bootp server service config
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