Information
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.
NOTE: Nessus has not performed this check. Please review the benchmark to ensure target compliance.
Solution
Remove unneeded services and functions from the router. Removal is recommended because the service or function may be inadvertently enabled otherwise. However, if removal is not possible, disable the service or function.
Step 1: Configure the Arista device to disable the features that are not required.
no logging console
no ip domain lookup source-interface lo0
no ntp
no mlag configuration
no dhcp server
Step 2: Configure the Arista device to disable the use of VLAN 1.
vlan 1 state suspend
interface e1
!
Step 3: Configure all unused ports to designated VLAN and suspend the VLAN to disable all unused ports.
routerport trunk native vlan 1000
routerport trunk allowed vlan except 1