About UDP connections
|Article:HOWTO27103|||||Created: 2010-01-08|||||Updated: 2010-01-15|||||Article URL http://www.symantec.com/docs/HOWTO27103|
For UDP communications, the client analyzes the first UDP datagram and applies the action that is taken on the initial datagram to all subsequent UDP datagrams for the current program session. Inbound or outbound traffic between the same computers is considered part of the UDP connection.
For stateful UDP traffic, when a UDP connection is made, the inbound UDP communication is allowed, even if the firewall rule blocks it. For example, if a rule blocks inbound UDP communications for a specific application, but you choose to allow an outbound UDP datagram, all inbound UDP communications are allowed for the current application session. For stateless UDP, you must create a firewall rule to allow the inbound UDP communication response.
Article URL http://www.symantec.com/docs/HOWTO27103