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Alarm Handling

AR100-S, AR110-S, AR120-S, AR150-S, AR160-S, AR200-S, AR1200-S, AR2200-S, and AR3200-S V200R009

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WLAN_1.3.6.1.4.1.2011.6.139.15.1.1.5 hwWlanWidsFloodAttackDetectedTrap

WLAN_1.3.6.1.4.1.2011.6.139.15.1.1.5 hwWlanWidsFloodAttackDetectedTrap

Description

WLAN/4/WIDS_DETECT_ATTACK_NOTIFY:OID [oid] Detected attack. (Monitor AP mac=[OPAQUE], Device Mac=[OPAQUE], Device channel=[INTEGER], Attack type=[INTEGER], Attack type string=[OCTET])

A flood attack was detected.

Attribute

Alarm ID Alarm Severity Alarm Type
1.3.6.1.4.1.2011.6.139.15.1.1.5 Warning environmentalAlarm(6)

Parameters

Name Meaning
oid Indicates the OID of the alarm.
Monitor AP mac Indicates the MAC address of a monitoring AP.
Device Mac Indicates the MAC address of the attacking device.
Device channel Indicates the channel of the attacking device.
Attack type
Indicates the ID of attack type.
  • 0: Probe Request Flood Attack
  • 1: Authentication Request Flood Attack
  • 2: Deauthentication Frame Flood Attack
  • 3: Association Request Flood Attack
  • 4: Disassociation Request Flood Attack
  • 5: Reassociation Request Flood Attack
  • 6: Action Frame Flood Attack
  • 9: EAPOL Start Frame Flood Attack
  • 10: EAPOL Logoff Frame Flood Attack
Attack type string Indicates the character string describing the attacking device type.

Impact on the System

The device is busy processing flood attack packets, which occupies too many CPU resources.

Possible Causes

A flood attack was detected.

Procedure

  1. Run the display wlan ids attack-detected and display wlan ids attack-detected statistics commands to check information about attacking devices and attack statistics and determine whether a flood attack occurs.

    • If not, go to Step 2 and modify the attack alarm threshold to prevent incorrect alarm reports.
    • If so, go to Step 3 and configure the dynamic blacklist function.

  2. Configure the attack alarm threshold.

    Enter the WIDS profile view and run the flood-detect interval and flood-detect threshold commands to configure the flood attack detection period and the maximum number of packets of the same type that an AP can receive within the period.

  3. Add the attacking device to the dynamic blacklist so that packets from the device will be discarded.
    1. Enter the specified WIDS profile view and run the dynamic-blacklist enable command to enable the dynamic blacklist function.
    2. Enter the specified AP system profile view and run the dynamic-blacklist aging-time command to configure an aging time for the dynamic blacklist entries.
  4. Then, check whether the alarm persists.

    • If so, go to Step 5.
    • If not, go to Step 6.

  5. Collect alarm messages, log messages, and configurations, and then contact the technical support personnel.
  6. End.

Related Information

None.

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Updated: 2019-05-06

Document ID: EDOC1000174085

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