V-217048

Discussion

If the gateway router is not a dedicated device for the OOBM network, several safeguards must be implemented for containment of management and production traffic boundaries. It is imperative that hosts from the managed network are not able to access the OOBM gateway router.

Check Content

This requirement is not applicable for the DoDIN Backbone.

Review the firewall filter applied to the routers loopback interface to verify that only traffic sourced from the OOBM network or the NOC is allowed to access the router as shown in the example below.

interfaces {
…
…
…
    lo0 {
        unit 0 {
            family inet {
                filter {
                    input PROTECT_RE;
                }
                address 1.1.1.1/32;
            }
        }
    }
}
…
…
…
firewall {
    family inet {
        filter PROTECT_RE {
            term RESTRICT_ADDRESS {
                from {
                    source-address {
                        0.0.0.0/0;
                        10.2.14.0/24 except;
                    }
                }
                then {
                    syslog;
                    discard;
                }
            }
            term ALLOW_OTHER {
                then accept;
            }
        }
    }
}

If the router does not block any traffic destined to itself that is not sourced from the OOBM network or the NOC, this is a finding.