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FL SWITCH GHS CLI
2-96
PHOENIX CONTACT
8039_en_01
no dos-control tcpflag
This command sets disables TCP Flag Denial of Service protections.
dos-control l4port
This command enables L4 Port Denial of Service protections. If the mode is enabled, Denial
of Service prevention is active for this type of attack. If packets ingress having Source
TCP/UDP Port Number equal to Destination TCP/UDP Port Number, the packets will be
dropped if the mode is enabled.
no dos-control l4port
This command disables L4 Port Denial of Service protections.
dos-control icmp
This command enables Maximum ICMP Packet Size Denial of Service protections. If the
mode is enabled, Denial of Service prevention is active for this type of attack. If ICMP Echo
Request (PING) packets ingress having a size greater than the configured value, the packets
will be dropped if the mode is enabled.
no dos-control icmp
This command disables Maximum ICMP Packet Size Denial of Service protections.
Format
no dos-control tcpflag
Mode
Global Config
Note:
Some applications mirror source and destination L4 ports - RIP for example uses 520 for both. If you enable
dos-control l4port, applications such as RIP may experience packet loss which would render the application
inoperable.
Default
disabled
Format
dos-control l4port
Mode
Global Config
Format
no dos-control l4port
Mode
Global Config
Default
disabled <512>
Format
dos-control icmp
<0-1023>
Mode
Global Config
Format
no dos-control icmp
Mode
Global Config
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