TMG Server detected a network element containing an invalid address range

Microsoft.Forefront.TMG.ISA_Server_detected_a_network_element_containing_an_invalid_address_range.Rule (Rule)

This Rule generates alerts when TMG Server detected a network element containing an invalid address range

Knowledge Base article:

Summary

TMG Server detected a network containing an invalid address range.

Causes

The network configuration is either invalid or it does not match the machine's routing table.

Resolutions

Review the network elements. Verify that address ranges do not conflict and that they are specified correctly.

Element properties:

Target	Microsoft.Forefront.TMG.Server
Category	EventCollection
Enabled	True
Alert Generate	False
Remotable	True

Member Modules:

ID	Module Type	TypeId	RunAs
DS	DataSource	Microsoft.Forefront.TMG.Rule.AlertGenerate.DS	Default
WA	WriteAction	Microsoft.Forefront.TMG.Rule.AlertGenerate.WA	Default

Source Code:

<Rule ID="Microsoft.Forefront.TMG.ISA_Server_detected_a_network_element_containing_an_invalid_address_range.Rule" Enabled="true" Target="Microsoft.Forefront.TMG.Server" ConfirmDelivery="true" Remotable="true" Priority="Normal" DiscardLevel="100">

  <Category>EventCollection</Category>

  <DataSources>

    <DataSource ID="DS" TypeID="Microsoft.Forefront.TMG.Rule.AlertGenerate.DS">

      <ComputerName>$Target/Host/Property[Type="Windows!Microsoft.Windows.Computer"]/NetworkName$</ComputerName>

      <LogName>Application</LogName>

      <EventsPattern>^(21096)$</EventsPattern>

      <EventType>1</EventType>

      <SourcePattern>Microsoft Forefront TMG Firewall</SourcePattern>

    </DataSource>

  </DataSources>

  <WriteActions>

    <WriteAction ID="WA" TypeID="Microsoft.Forefront.TMG.Rule.AlertGenerate.WA">

      <AlertMessageId>$MPElement[Name="Microsoft.Forefront.TMG.ISA_Server_detected_a_network_element_containing_an_invalid_address_range.AlertMessage"]$</AlertMessageId>

      <DomainName>$Target/Host/Property[Type="Windows!Microsoft.Windows.Computer"]/DomainDnsName$</DomainName>

      <Priority>2</Priority>

      <Severity>2</Severity>

    </WriteAction>

  </WriteActions>

</Rule>