Detections
Analytics
CISC-RT-000350 - The Cisco perimeter switch must be configured to block all packets with any IP options.
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This audit has been deprecated and will be removed in a future update.
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Packets with IP options are not fast switched and henceforth 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 drop all packets with IP option source routing.SW1(config)# no ip source-route
SW1(config)# end
See Also
https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_Cisco_NX-OS_Switch_Y26M01_STIG.zip
Item Details
Audit Name: DISA Cisco NX OS Switch RTR STIG v3r3
References: CAT|II, CCI|CCI-002403, Rule-ID|SV-221095r999704_rule, STIG-ID|CISC-RT-000350, STIG-Legacy|SV-111009, STIG-Legacy|V-101905, Vuln-ID|V-221095
Plugin: Cisco
Control ID: ad30573c8e4a9404b83bb8549a2dc5820076df9ec7ed0182a4e32d7aa451d3c7