JUNI-RT-000270 - The Juniper perimeter router must be configured to block inbound packets with source Bogon IP address prefixes - prefix-list

Information

Packets with Bogon IP source addresses should never be allowed to traverse the IP core. Bogon IP networks are RFC1918 addresses or address blocks that have never been assigned by the IANA or have been reserved.

Solution

This requirement is not applicable for the DoDIN Backbone.

Configure the perimeter to block inbound packets with Bogon source addresses.

Configure a prefix list containing the current Bogon prefixes as shown below.

[edit policy-options]
set prefix-list BOGON_PREFIXES 0.0.0.0/8
set prefix-list BOGON_PREFIXES 10.0.0.0/8
set prefix-list BOGON_PREFIXES 100.64.0.0/10
set prefix-list BOGON_PREFIXES 127.0.0.0/8
set prefix-list BOGON_PREFIXES 169.254.0.0/16
set prefix-list BOGON_PREFIXES 172.16.0.0/12
set prefix-list BOGON_PREFIXES 192.0.0.0/24
set prefix-list BOGON_PREFIXES 192.0.2.0/24
set prefix-list BOGON_PREFIXES 192.168.0.0/16
set prefix-list BOGON_PREFIXES 198.18.0.0/15
set prefix-list BOGON_PREFIXES 198.51.100.0/24
set prefix-list BOGON_PREFIXES 203.0.113.0/24
set prefix-list BOGON_PREFIXES 224.0.0.0/4
set prefix-list BOGON_PREFIXES 240.0.0.0/4

Add a term to the inbound filter to block the Bogon prefixes.

[edit firewall family inet filter INBOUND_FILTER]
set term BLOCK_BOGONS from source-prefix-list BOGON_PREFIXES
set term BLOCK_BOGONS then syslog discard
insert term BLOCK_BOGONS before term ALLOW_BGP

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_Juniper_Router_Y24M07_STIG.zip

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-7(11), CAT|II, CCI|CCI-002403, Rule-ID|SV-217032r855894_rule, STIG-ID|JUNI-RT-000270, STIG-Legacy|SV-101059, STIG-Legacy|V-90849, Vuln-ID|V-217032

Plugin: Juniper

Control ID: e50f739a2f7f307adf632c8439629742c9fc0926532010e30f6b9b1e51ab2c9a