Detections
Analytics

1.68 CISC-RT-000750

Information

The Cisco PE switch must be configured to ignore or drop all packets with any IP options.

GROUP ID: V-221049
RULE ID: SV-221049r945860

Packets with IP options are not fast-switched and therefore must be punted to the switch processor. Hackers who initiate denial-of-service (DoS) attacks on switches commonly send large streams of packets with IP options. Dropping the packets with IP options reduces the load of IP options packets on the switch. The end result is a reduction in the effects of the DoS attack on the switch and on downstream switches.

Solution

Configure the switch to ignore or drop all packets with IP options as shown in the examples below:

SW1(config)#ip options ignore

or

SW1(config)#ip options drop

See Also

https://workbench.cisecurity.org/benchmarks/26260

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-7(11), CAT|II, CCI|CCI-002403, Rule-ID|SV-221049r945860_rule, STIG-ID|CISC-RT-000750, Vuln-ID|V-221049

Plugin: Cisco

Control ID: 2646e4351d4eabf70117ba1feabf9e0cc9ae48634743ab3bd1cc1b42cf3550a9