CISC-RT-000350 - The Cisco perimeter router must be configured to block all packets with any IP options.

Information

Packets with IP options are not fast switched and henceforth 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.

Solution

This requirement is not applicable for the DODIN Backbone.

Configure the router to drop all packets with IP option source routing.

RP/0/0/CPU0:R3(config)#no ipv4 source-route

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_Cisco_IOS-XR_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-217006r945859_rule, STIG-ID|CISC-RT-000350, STIG-Legacy|SV-105871, STIG-Legacy|V-96733, Vuln-ID|V-217006

Plugin: Cisco

Control ID: c997230f6c62310fc56388690d5bc76cb22cb3173bdbc60f85dd952225bfc353