The connectivity information allows a client application to connect to any IBM Informix database server on the network. The connectivity data for a particular database server includes the database server name, the type of connection that a client can use to connect to it, the host name of the computer or node on which the database server runs, and the service name by which it is known.
You must prepare the connectivity information even if the client application and the database server are on the same computer or node.
You do not need to specify all possible network connections in the sqlhosts file or registry before you start the database server. But to make a new connection available, you must take the database server offline and then bring it back to online mode once again.
For detailed information about configuring connectivity, see Client/Server Communications.
When you configure connectivity on UNIX, also consider setting the LISTEN_TIMEOUT and MAX_INCOMPLETE_CONNECTIONS configuration parameters. These parameters enable you to reduce the risk of a hostile denial-of-service (DOS) attack by making it more difficult to overwhelm the Listener VP that handles connections. For more information, see Limiting Denial-of-Service Flood Attacks
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