udp-flood detect

Use udp-flood detect to configure IP address-specific UDP flood attack detection.

Use undo udp-flood detect to remove the IP address-specific UDP flood attack detection configuration.

Syntax

udp-flood detect { ip ipv4-address | ipv6 ipv6-address } [ vpn-instance vpn-instance-name ] [ threshold threshold-value ] [ action { { drop | logging } * | none } ]

undo udp-flood detect { ip ipv4-address | ipv6 ipv6-address } [ vpn-instance vpn-instance-name ]

Default

IP address-specific UDP flood attack detection is not configured.

Views

Attack defense policy view

Predefined user roles

network-admin

mdc-admin

Parameters

ip ipv4-address: Specifies the IPv4 address to be protected. The ip-address argument cannot be all 1s or 0s.

ipv6 ipv6-address: Specifies the IPv6 address to be protected.

vpn-instance vpn-instance-name: Specifies the MPLS L3VPN instance to which the protected IP address belongs. The vpn-instance-name argument is a case-sensitive string of 1 to 31 characters. Do not specify this option if the protected IP address is on the public network.

threshold threshold-value: Specifies the threshold for triggering UDP flood attack prevention. The value range is 1 to 1000000 in units of UDP packets sent to the specified IP address per second.

action: Specifies the actions when a UDP flood attack is detected. If no action is specified, the global actions set by the udp-flood action command apply.

drop: Drops subsequent UDP packets destined for the protected IP address.

logging: Enables logging for UDP flood attack events.

none: Takes no action.

Usage guidelines

With UDP flood attack detection configured for an IP address, the device is in attack detection state. When the sending rate of UDP packets to the IP address reaches the threshold, the device enters prevention state and takes the specified actions. When the rate is below the silence threshold (three-fourths of the threshold), the device returns to the attack detection state.

You can configure UDP flood attack detection for multiple IP addresses in one attack defense policy.

Examples

# Configure UDP flood attack detection for 192.168.1.2 in attack defense policy atk-policy-1.

<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] udp-flood detect ip 192.168.1.2 threshold 2000

Related commands

udp-flood action

udp-flood detect non-specific

udp-flood threshold