DoS Attack Check

AP.Remote.Access.Monitor.DA_DOSP_HEURISTIC_DOS_ATTACK (UnitMonitor)

Check to verify if a DoS attack is underway

Knowledge Base article:

Summary

A Denial of Service (DoS) attack might be underway.

Causes

1. IPsec has entered a DoS condition. This might indicate a DoS attack or a spike in the server load.

2. A high percentage of traffic was dropped because it failed security validation, and might constitute a potential attack on the server.

3. A large number of Security Associations (SAs) have failed negotiations.

Resolutions

A Denial of Service (DoS) attack might be underway. Take steps to mitigate the possible attack.

Element properties:

TargetAP.Remote.Access.Class.NetworkSecurity
Parent MonitorSystem.Health.SecurityState
CategoryCustom
EnabledTrue
Alert GenerateTrue
Alert SeverityError
Alert PriorityNormal
Alert Auto ResolveTrue
Monitor TypeAP.Remote.Access.Monitor.HeuristicMonitorType
RemotableTrue
AccessibilityPublic
Alert Message
Potential DoS attack

Error Description - {0}
Error Cause - {1}
Error Resolution - {2}
RunAsDefault

Source Code:

<UnitMonitor ID="AP.Remote.Access.Monitor.DA_DOSP_HEURISTIC_DOS_ATTACK" Accessibility="Public" Enabled="true" Target="AP.Remote.Access.Class.NetworkSecurity" ParentMonitorID="Health!System.Health.SecurityState" Remotable="true" Priority="Normal" TypeID="AP.Remote.Access.Monitor.HeuristicMonitorType" ConfirmDelivery="true">
<Category>Custom</Category>
<AlertSettings AlertMessage="AP.Remote.Access.Monitor.DA_DOSP_HEURISTIC_DOS_ATTACK_AlertMessageResourceID">
<AlertOnState>Warning</AlertOnState>
<AutoResolve>true</AutoResolve>
<AlertPriority>Normal</AlertPriority>
<AlertSeverity>Error</AlertSeverity>
<AlertParameters>
<AlertParameter1>$Data/Context/DataItem/Property[@Name='ErrorDesc']$</AlertParameter1>
<AlertParameter2>$Data/Context/DataItem/Property[@Name='ErrorCause']$</AlertParameter2>
<AlertParameter3>$Data/Context/DataItem/Property[@Name='ErrorResolution']$</AlertParameter3>
</AlertParameters>
</AlertSettings>
<OperationalStates>
<OperationalState ID="DA_DOSP_HEURISTIC_DOS_ATTACK_Error" MonitorTypeStateID="Error" HealthState="Error"/>
<OperationalState ID="DA_DOSP_HEURISTIC_DOS_ATTACK_Warning" MonitorTypeStateID="Warning" HealthState="Warning"/>
<OperationalState ID="DA_DOSP_HEURISTIC_DOS_ATTACK_Success" MonitorTypeStateID="Healthy" HealthState="Success"/>
</OperationalStates>
<Configuration>
<Interval>300</Interval>
<SyncTime/>
<ComponentName>Network Security</ComponentName>
<HeuristicId>2147745796</HeuristicId>
<Debug>false</Debug>
</Configuration>
</UnitMonitor>