The Juniper PE router must be configured to ignore or block all packets with any IP options.
An XCCDF Rule
Description
<VulnDiscussion>Packets with IP options are not fast switched and therefore must be punted to the router processor. Hackers who initiate denial-of-service (DoS) attacks on routers commonly send large streams of packets with IP options. Dropping the packets with IP options reduces the load of IP options packets on the router. The end result is a reduction in the effects of the DoS attack on the router and on downstream routers.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-217078r604135_rule
- Severity
- Medium
- References
- Updated
Remediation - Manual Procedure
Configure the router to drop all packets with IP options.
[edit firewall family inet filter INGRESS_FILTER]
set term BLOCK_IP_OPTIONS from ip-options any
set term BLOCK_IP_OPTIONS then discard
insert term BLOCK_IP_OPTIONS before term ALLOW_TRANSIT_TRAFFIC