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V-273587

CAT III (Low)

The RUCKUS ICX perimeter router must be configured to not redistribute static routes to an alternate gateway service provider into BGP or an IGP peering with the NIPRNet or to other autonomous systems.

Rule ID

SV-273587r1111281_rule

STIG

RUCKUS ICX Router Security Technical Implementation Guide

Version

V1R1

CCIs

CCI-001414

Discussion

If the static routes to the alternate gateway are being redistributed into an Exterior Gateway Protocol or Interior Gateway Protocol to a NIPRNet gateway, this could make traffic on NIPRNet flow to that particular router and not to the Internet Access Pointerface routers. This could not only wreak havoc with traffic flows on NIPRNet, but it could overwhelm the connection from the router to the NIPRNet gateway(s) and also cause traffic destined for outside of NIPRNet to bypass the defenses of the Internet Access Points.

Check Content

This requirement is not applicable for the DODIN Backbone. 

Review ICX router configuration for statements redistributing static routes into IGP or BGP:
router bgp
 local-as 1001
 neighbor x.4.4.4 remote-as 1000
 redistribute static
!
router ospf
 redistribute static
!

If static routes with the alternate gateway service provider as the next hop exist and static routes are redistributed into an IGP or BGP (without a route-map filter), this is a finding.

Fix Text

This requirement is not applicable for the DODIN Backbone. 

Create a prefix list to be used by route map to prevent static routes pointing to the alternate gateway service provider from being redistributed:
ip prefix-list ISP_PREFIX permit 10.12.1.0/24

route-map FILTER_ISP_STATIC deny 10
 match ip address prefix-list ISP_PREFIX
route-map FILTER_ISP_STATIC permit 20
!

router ospf
 redistribute static route-map FILTER_ISP_STATIC
!