dns State Engine

The dns state engine is used for UDP DNS sessions. It looks inside the DNS responses and verifies that they have the same DNS ID as the request. The predefined service dns uses this state engine and is normally the only service to use this state engine. Note that since the DNS service also uses the TCP protocol, the predefined service dns also has a second entry using the tcp state engine.

The discriminator for the dns state engine is the UDP port number of the DNS service. This is normally 53.

The dns state engine has one parameter:

• Response timeout in second - Specifies the time to wait for DNS responses. Default is 60 seconds.