Event ID - 14012

Event Id14012
SourceDNS Intrusion Detection Filter
DescriptionFirewall client from %1 attempted to access ISA Server using control protocol version %2. The server supports version %3. The version of the Firewall client software is incompatible with the server version. If the Firewall client software is older than the server software, upgrade the Firewall client software. If the server software is older, either upgrade the server or direct the client to a different server that uses the newer software.
Event InformationAccording to Microsoft

Cause:
Firewall Client for ISA Server 2004 uses a protocol that encrypts the channel between the Firewall client and ISA Server. Firewall clients running earlier versions of the Firewall Client software are supported only if the option allowing them to connect is enabled. Encryption will not be used for these connections.
Resolution:
If the Firewall client software is older than the ISA Server software, upgrade the Firewall client software.Alternatley, you can enable Firewall clients running older versions of the Firewall Client software to connect to ISA Server 2004. To do this, in the ISA Server Management console, click Configuration, and then click General. In the General details pane, click Define Firewall Client Settings, click the Application Settings tab, and then select Allow non-encrypted Firewall Client connections.
Reference LinksEvent Id:14012 Source Id:DNS Intrusion Detection Filter

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